Please check my answer just to be safe :)
The diagram below shows the fossil record of bivalves over millions of
years.The change observed in the fossil record supports which of the following statements?
A) Species can change very little for a long time, and then undergo dramatic change over a relatively short period of time, followed by another long period of little change.
B) Species can change drastically, multiple times, over very short periods of time.
C) Species can change drastically for a short period of time, and then undergo very little change over a long period of time, followed by another short period of drastic change.
D) Species can change gradually and consistently over a very long period of time.
Answers
Species change gradually and consistenly over a very long period of time. This is known as species adaptation. Thus, the correct option is D.
Species do not undergo drastic changes over a short period of time, rather it is a gradual change which occurs. These changes accumulate over a long period of time.
The changes are a result of modifications in the phenotype due to the mutations in the genotype. These mutations occur for better adaptation to the changing environment for the survival of the species.
Thus, the change that is seen in the bivalves has occurred over a long period of time gradually for adapting to the environment in a way that facilitates survival of the bivalves shown in the diagram.
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Related Questions
Which statement BEST describes the differences illustrated in the diagram above:
Question 19 options:
Figure A represents punctuated equilibrium because rapid change happens and then change does not occur for a period of time
Figure A represents punctuated equilibrium because there is an accumulation of small genetic changes over long periods of time.
Figure B represents gradualism because rapid change happens and then change does not occur for a period of time
Both Figure A & B represent gradualism because there is an accumulation of small genetic changes over long periods of time.
Answers
Figure A = Punctuated equilibrium with rapid changes followed by stability. Figure B = Gradualism with continuous, slow changes.
The best explanation that portrays the distinctions outlined in the chart above is that Figure An addresses interspersed harmony since there is a collection of little hereditary changes over significant stretches of time, trailed by quick change, and afterward change doesn't happen for a while.
Then again, Figure B addresses gradualism since there is a consistent, slow gathering of little hereditary changes over a significant stretch of time.
Accentuated balance is a hypothesis that recommends that transformative changes happen in short eruptions of quick change, trailed by significant stretches of balance or dependability. During these times of strength, next to zero hereditary change happens.
Gradualism, then again, proposes that development occurs at a gradual speed over a significant stretch of time.
In Figure A, we can see that there are times of soundness where there is minimal hereditary change, trailed by an unexpected explosion of quick change.
This example is reliable with the hypothesis of accentuated harmony. In Figure B, there is a constant, continuous change over a significant stretch of time, which is steady with the hypothesis of gradualism.
In synopsis, the primary contrast showed in the graph is the pace of developmental change after some time. Figure An addresses interspersed harmony, while Figure B addresses gradualism.
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how long does it take a 180g sample of radioactive gold (half-life=2.69) to decay to 1/8 its original mass?
Answers
It would take approximately 6.27 years for a 180g sample of radioactive gold (with a half-life of 2.69 years) to decay to 1/8 its original mass.
The decay of radioactive gold can be modeled by the equation:
N(t) = N₀ * (1/2)^(t / t₁/₂)
where N(t) is the remaining mass at time t, N₀ is the initial mass, t₁/₂ is the half-life, and t is the elapsed time.
In this case, we want to find the time it takes for a 180g sample of radioactive gold to decay to 1/8 its original mass. This means that the remaining mass (N(t)) is 180g / 8 = 22.5g. We can substitute these values into the equation and solve for t:
22.5g = 180g * (1/2)^(t / 2.69)
Dividing both sides by 180g:
(22.5g / 180g) = (1/2)^(t / 2.69)
Taking the natural logarithm of both sides:
ln(22.5/180) = (t / 2.69) * ln(1/2)
Simplifying:
t = (2.69 / ln(1/2)) * ln(22.5/180)
t ≈ 6.27 years
Therefore, it would take approximately 6.27 years for a 180g sample of radioactive gold (with a half-life of 2.69 years) to decay to 1/8 its original mass.
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I don’t know what the rest are please help
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Answer:
Can you please specify your Question to me?
The moon and sun appear to move in the sky this is due to
Answers
The moon and sun appear to move in the sky because the Earth is rotating on its axis.
How do the sun and moon operate?The moon's orbit around the Earth also contributes to its apparent motion in the sky. The moon takes about 27 days to orbit the Earth, so it appears to move across the sky at a rate of about 12 degrees per day. The moon's orbit is also elliptical, so its distance from the Earth varies. When the moon is closer to the Earth, it appears larger in the sky.
The sun's orbit around the Earth is much larger than the moon's orbit. The sun takes about 365 days to orbit the Earth, so it appears to move across the sky at a rate of about 1 degree per day. The sun's orbit is also elliptical, but its distance from the Earth does not vary as much as the moon's distance from the Earth.
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If the population of crab becomes extinct in this food web which population would most likely decrease
Answers
For example, in a food web that includes crabs, fish, and sea birds, if crabs become extinct, the population of fish that crabs feed on may increase. This increase in the fish population may then lead to a decrease in the population of the small organisms that the fish feed on.
On the other hand, if crabs are preyed upon by sea birds, then the population of sea birds may decrease if they are unable to find alternative food sources. This, in turn, may impact the population of the organisms that the sea birds feed on, as they may not be consumed at the same rate as before.
Overall, the extinction of any species in a food web can have significant impacts on other populations within that web, and can cause ripple effects throughout the ecosystem.
Which of the following represents a way that animals in a zoo are influenced by their environment? a. increased natural instincts b. decreased aggression c. unnatural behavior d. increased appetite
Answers
Answer:
The correct answer is c. unnatural behavior.
Explanation:
Animals in a zoo are influenced by their environment, and one of the ways this influence is manifested is through unnatural behavior. In a zoo setting, animals are often kept in confined spaces that may not mimic their natural habitats adequately. This can lead to behavioral changes and adaptations that are not typical of their wild counterparts. Animals may exhibit abnormal behaviors such as pacing, stereotypic movements, or self-injurious behaviors due to stress, frustration, or lack of environmental enrichment.
While it is possible for animals in a zoo to display increased natural instincts, decreased aggression, or increased appetite in certain situations, these outcomes are not universally applicable or exclusive to zoo environments. They can vary depending on the species, individual, and specific circumstances. However, unnatural behavior is a commonly observed consequence of animals being in an environment that does not fully meet their natural behavioral and environmental needs.
When Charles Darwin published his book On the Origin of Species, he addressed his theory of descent with modification through
1. transitional fossils.
2. intermediate forms.
3. natural selection.
4. positive correlation.
Answers
Charles Darwin addressed his theory of descent with (3) Natural selection in his book On the Origin of Species
In his seminal book, "On the Origin of Species," Charles Darwin presented his theory of descent with modification, which proposed that species evolve over time through the process of natural selection.
According to Darwin, variation exists within populations, and individuals with favorable traits are more likely to survive and reproduce, passing their traits on to their offspring.
This leads to the gradual accumulation of advantageous traits in a population over generations, resulting in the evolution of new species.
Darwin's theory did not rely solely on the existence of transitional fossils or intermediate forms, although these have since provided strong evidence supporting his theory.
Rather, it was natural selection that explained how species could change and adapt to their environments over time.
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This picture shows a food web for a forest ecosystem. Evaluate each of the choices and select ALL of those that include ONLY secondary consumers.
Responses
A rabbits, foxes, spiders rabbits, foxes, spiders
B spiders, predaceous insects, foxes spiders, predaceous insects, foxes
C herbivorous insects, mice, squirrels herbivorous insects, mice, squirrels
D hawks, owls, foxeshawks, owls, foxes
E insectivorous birds, hawks, spiders
Answers
The only choices from a food web for a forest ecosystem that include only secondary consumers are B and D.
What are the food webs like?A. rabbits, foxes, spiders
Rabbits are primary consumers because they eat plants. Foxes are secondary consumers because they eat rabbits. Spiders are predators, but they can be either primary or secondary consumers depending on what they eat. If they eat insects, they are primary consumers. If they eat other spiders, they are secondary consumers.
B. spiders, predaceous insects, foxes
Spiders and predaceous insects are both predators, and they both eat other insects. Insects are primary consumers, so spiders and predaceous insects are secondary consumers. Foxes are also secondary consumers because they eat rabbits, which are primary consumers.
C. herbivorous insects, mice, squirrels
Herbivorous insects are primary consumers because they eat plants. Mice and squirrels are primary consumers because they eat nuts and seeds.
D. hawks, owls, foxes
Hawks, owls, and foxes are all secondary consumers because they eat primary consumers, such as rabbits and mice.
E. insectivorous birds, hawks, spiders
Insectivorous birds are primary consumers because they eat insects. Hawks are secondary consumers because they eat rabbits, which are primary consumers. Spiders can be either primary or secondary consumers, depending on what they eat. If they eat insects, they are primary consumers. If they eat other spiders, they are secondary consumers.
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The efferent pathway of the autonomic nervous system consists of ________?
1) a single neuron which does not synapse
2) multiple neurons which synapse without a ganglion
3) multiple neurons which synapse at a ganglion
4) a single neuron which passed through a ganglion
Answers
The efferent pathway of the autonomic nervous system consists of preganglionic neurons and postganglionic neurons which synapse at a ganglion. The correct option is C.
Thus, the efferent pathway of the autonomic nervous system consists of neurons that synapse at an autonomic ganglion. The autonomic nervous system is a peripheral nervous system regulating the involuntary functions of the body consisting of preganglionic neurons and postganglionic neurons.
The preganglionic neuron is the first neuron that originates in the central nervous system that synapses with the second neuron, which is called a postganglionic neuron at an autonomic ganglion in an autonomic nervous system. The postganglionic neuron then extends its axon to the effector organs, which are smooth muscle, cardiac muscle, or gland.
Thus, the ideal selection is option C.
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Please show a picture of the labelled diagram
The fluid mosaic model of membrane structure was first proposed in 1972 by Singer and
Nicolson. The model describes in detail how the components of a membrane are organised.
(a) Some of the components of the cell surface membrane are:
phospholipid molecules
protein molecules
cholesterol molecules.
(i) In the box below, draw a labelled diagram of a section through a cell surface
membrane to show how the above components are organised within the membrane.
The diagram should include other named components of the membrane.
Label the inner and outer surfaces of the membrane.
Answers
Briefly explain THREE constitutional limitations to the right to freedom expression
Answers
Answer:
Three limitations to the right to freedom of expression are now no longer covered by the Constitution: propaganda for war, incitement to violence, and incitement to violence as a means to achieve an objective.
Explanation:
In India, what are the constraints on freedom of expression that exist?
As reported by the Supreme Court of India in the Union of India, the right to freedom of speech and expression has no geographical limitations, and it comes with it the right for a citizen to acquire information and to exchange ideas with others now not merely within the country but also overseas.
In section sixteen, we find the following boundaries that govern our freedom of expression. In addition to the proper in subsection (1), it does not now extend to propaganda for war; incitement to violence; or advocacy of hatred. Incitement to harm has to do with the fact that it is primarily motivated by racial, ethnic, gender or religious prejudice, and that constitutes incitement to harm.
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PLEASE HELP BIOLOGY QUESTION I already did it but I need someone to check as I haven’t learned it in a while. If I got it wrong please explain what I did. I feel like I missed a step.
Answers
The transcription and translation of the given DNA strand are as follows:
Transcription: UGC AUG UUU GUG AAU UAG UAU GAUTranslation: Cys-Met-Phe-Val-Asn-Stop-Tyr-AspWhat is the process of translation of the genetic code?The genetic code specifies how an mRNA sequence is to be translated into the 20-letter code of amino acids, which are the building blocks of proteins.
The translation of the genetic code occurs in three steps;
replication - this involves the replication of DNAtranscription - this is the process of synthesis of mRNA from DNAtranslation - this is the process of the synthesis of peptides from mRNA and this involves three steps as well; initiation, elongation, and termination.Learn more about the genetic code at: https://brainly.com/question/16914106
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The process of water absorption through the root
Answers
1. Active absorption and passive absorption are the two mechanisms through which roots absorb water.
2. Two aspects of the xylem's structural suitability for this function are:
Tracheary Elements and Uninterrupted Water Pathway.What is the function of the xylem in plants?The xylem tissue is specialized for the transport of water and dissolved minerals from the roots to the rest of the plant.
Two aspects of its structural suitability for this function are:
Tracheary Elements: The xylem is composed of tracheary elements, which include tracheids and vessel elements and thickening of the cell walls provides strength and support, enabling the xylem to withstand the pressure generated during water transport.
Uninterrupted Water Pathway: The xylem vessels have no end walls or cell contents, creating a continuous pathway for water movement which allows for efficient and uninterrupted water flow, reducing resistance and facilitating the bulk movement of water through the plant.
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Write a 1000 words Essay on The role of kinases in cell signalling pathways?
Answers
Cell signalling is a complex and highly regulated process that allows cells to communicate and coordinate their activities. It involves the transmission of signals from one cell to another
What are the kinases?Receptor tyrosine kinases (RTKs) are a well-known class of kinases that are involved in cell signaling. RTKs are transmembrane proteins with an intracellular kinase domain and an extracellular ligand-binding domain that span the cell membrane.
RTKs go through dimerization and autophosphorylation when certain ligands connect to them, activating their kinase activity. When downstream signaling molecules hook on phosphorylated tyrosine residues on RTKs, a series of events that result in different cellular responses are set off.
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Can someone help please, it’s just to verify if the top half is right the diagram of the carbon cycle. Thx
Answers
Answer:
Yeps it right 95%, 5 percent less cause your teaching may vary
Will the trend toward an increased incidence of tusklessness in a population with heavy poaching lead to increased African elephant population sizes in the future?
Answers
No, the trend toward increased tusklessness in African elephants due to heavy poaching is not likely to lead to increased population sizes in the future.
While tuskless elephants may have a survival advantage in areas with high levels of poaching, this advantage is likely to be temporary. Over the long term, tusklessness may lead to reduced genetic diversity and reproductive success, as tusks play a role in mate selection and competition among males.
Additionally, tuskless elephants may be less able to defend themselves and their young against predators and may have a reduced ability to forage for food. Thus, while tusklessness may confer some immediate benefits in areas with high levels of poaching, it is not a viable long-term solution for elephant populations.
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Which of the following is evidence for the endosymbiosis theory?
Answers
Answer:
Mitochondria and chloroplast contain DNA similar to bacterial DNA
Explanation:
Both mitochondria and chloroplast have their own DNA, which by then was known to contain the hereditary material of organisms. Mitochondrial DNA has a simple circular structure, which is structurally similar to bacteria DNA and is more or less the same size.
Your answer is correct!
5. Suppose that every year, one half of the population has two offspring per
person, and the other half has none. If all members of the population die after a
year, what is the resulting growth rate? Explain your answer.
Answers
The resulting growth rate of the population in this scenario would be a net growth rate of one offspring per person per year.
This is because, on average, half of the population will have two offspring per year while the other half will have none. To break it down further, let's assume that there are 100 people in the population. In one year, 50 of them will have two offspring each, resulting in a total of 100 new offspring. The other 50 people will not have any offspring. Therefore, the net growth rate is 100 new offspring divided by 100 people, which equals one new offspring per person. It is important to note that this scenario assumes a perfect balance between the two groups of the population. In reality, there are many factors that can influence reproductive rates, including age, health, access to resources, and cultural norms. Additionally, this scenario does not take into account any deaths or migration, which could impact the overall growth rate of the population. Overall, this scenario demonstrates the concept of replacement-level fertility, where each person is replaced by two offspring. However, it is important to consider the many complex factors that can influence population growth rates in real-world situations.
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Part B
Carry out these steps, and record your findings in the table.
1. Pour water to the 2.0 mL mark in the graduated cylinder. If you look at the graduated cylinder from the side, you will see the water forms a curve. Make sure the bottom of the curve is at the 2.0 mL mark.
2. Use the gram scale to measure the mass of the graduated cylinder and 2.0 mL of water. Record the mass in the table. Calculate the mass of 2.0 mL of water by subtracting the mass of the graduated cylinder.
3. Repeat this process to find and record the mass of 4.0 mL of water and then 6.0 mL of water.
4. Density is mass in grams divided by volume in cubic centimeters (cm3). 1 mL is equal to 1 cm3. Calculate and record the density of water.
Answers
The meniscus, or curved shape of the water in a graduated cylinder, can alter the measurement's accuracy by making the reading appear to grow or decrease.
The reason for this is because the water level is either higher or lower than anticipated as a result of the interaction between the water molecules and the surface of the graduated cylinder. Readings should be obtained at eye level with the measuring line at the bottom of the meniscus in order to reduce this impact. Additionally, the measurement's accuracy can be increased by using a cylinder with a smaller diameter and a larger scale.
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--The complete Question is, How does the curved shape of water in a graduated cylinder affect the accuracy of measuring its volume? --
three ways in which geographical location of people through hampers media provide them with information timeously.
Answers
The three ways are;
Limited InfrastructureTime Zone DifferencesLanguage and Cultural BarrierWhat are the three ways?There may not be adequate infrastructure, such as dependable internet connectivity, television networks, or print media distribution routes, in some distant or impoverished places.
Time zone differences can also be significantly influenced by geography. Receiving current news can be delayed if media outlets or news sources are based predominantly in another time zone.
Media content may need to be translated or adjusted for different audiences in regions with a variety of languages or cultural backgrounds.
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What if you can feel ice, cold as well as warm depending on your temperature.
Answers
Answer:
A dysfunction of the hypothalamus can cause your body to temporarily become over heated (hot flash) or chilled (cold flash).
Organisms participate in group behaviors in order to survive. Which statement best describes how this relates to reproduction?
A. Increased chances of reproduction means increased chances of the individual's survival.
B. Increased chances of survival means increased chances of successful reproduction.
C. The offspring of individuals that reproduce outside of a group are more likely to survive.
D. Individuals that survive outside of a group are more likely to reproduce.
Answers
B. Increased chances of survival means increased chances of successful reproduction.
Organisms that participate in group behaviors, such as hunting or socializing, often have an increased chance of survival compared to those that live in isolation. This increased chance of survival leads to increased opportunities for successful reproduction, as individuals that survive longer have more opportunities to mate and produce offspring. Therefore, group behaviors can be seen as a means to an end of successful reproduction, rather than an end in and of themselves.
Which of these choices is required by organic agriculture but not by
sustainable agriculture?
Answers
One of the choices that is required by organic agriculture but not by
sustainable agriculture is option B which is enough space for animals to behave naturally.
Organic agriculture explained.
Organic agriculture is a system of of farming and rearing of animals that require using natural inputs and not employing the use of an artificial inputs .
Some of the key approaches or aim of organic agriculture is to ensure the welfare of animals, in which animals can move and enjoy natural space, its also is to prevent the use of synthetic inputs to reduce harm or toxic effect to humans, it also entails maintain the ecosystem by reducing the effect of green house , improving soil health and also ensure ecological balance.
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Although there are many kinds of thick soups in the world, they can all be summed up into what two basic categories?
O A. cream-based and purend
OB.
chunky and smooth
C. spicy and sweet
D. savory and bitter
Answers
Answer:the answer is b
Explanation:
Citizens in Los Angeles convinced local officials in Los Angeles to throw out a plan to build a warehouse on reclaimed land, instead
turning it into a park.
How have people benefited from this restoration of land?
O The park prevents people from being exposed to pollutants in the soil.
O The land provides recreational space and takes carbon dioxide from the atmosphere.
O The city uses the park as a warehouse while still benefiting from nature.
Davides employment to thousands of local people.
Answers
Answer:
B
Explanation:
Answer: the land provides recreational space and takes carbon dioxide from the atmosphere.
Explanation: i took the test and got it correct!
6 Copy and complete these sentences which give three important characteristics of metamorphic rocks: Metamorphic rocks are shiny because they are Metamorphic rocks sometimes have many because of pressure Metamorphic rocks sometimes have of crystals because of pressure
Answers
Complete sentences:
1. Metamorphic rocks are shiny because they are subjected to intense heat and pressure, which leads to the recrystallization of minerals within the rock.
During this process, the minerals form new interlocking crystals with smooth surfaces that reflect light, giving the rocks a shiny appearance.
2. Metamorphic rocks sometimes have many foliations (layered textures) because of the directional pressure acting on the rock over time.
As the rock undergoes metamorphism, the minerals realign and reorganize in response to this pressure, resulting in the development of distinct layers or foliations within the rock.
3. Metamorphic rocks sometimes have larger and well-defined crystals because of the increased pressure and heat they experience during metamorphism.
As the rock is subjected to these conditions, the minerals are given the opportunity to grow and recrystallize, allowing for the formation of larger crystal sizes.
The pressure helps to compress and compact the minerals, enabling the development of well-defined crystal structures within the rock.
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What are the probable phenotypes of both the first and second generations of sheep, after the black sheep are introduced
Answers
Answer: In the first generation the sheep will most likely be all white but as you continue with them in the second generation you might be able to get a few black sheep but it has to do with the dominant and recessive genes.
Explanation:
this was a question on my test last week
what might happen if all carnivores disappeared
Answers
Answer:
the population of herbivores, will increase
Explanation:
If all the carnivores are removed from the earth, the population of herbivores, will increase. Large population of herbivores will overgraze. As a result, all plants will disappear from the earth surface and ultimately the earth may become a desert.
Answer:
Below
Explanation:
There will be a dramatic increase in the population of primary consumers (herbivores), because there would be no predators that could hunt them. And we must keep in mind that removing atleast one species from an ecosystem can cause an imbalance and the ripple effect will bring nothing good.
In a nutshell, there would be too many herbivores on the planet.
why will the characteristics of a bug population change in different ways in response to different types of predators
Answers
The characteristics of a bug population, such as size, behavior, and reproductive patterns, may change in response to different types of predators due to selective pressures imposed by each predator.
Different predators may have different hunting strategies and preferences, which can lead to differential selection pressures on the bug population. For example, a predator that targets larger bugs may select for smaller body size, while a predator that targets bugs with bright colors may select for duller coloration.
Additionally, different types of predators may have varying levels of effectiveness in controlling bug populations, which can also impact their characteristics over time. The presence of predators can also impact the behavior of bug populations. Bugs may alter their activity patterns, foraging strategies, or mating behaviors to avoid or minimize the risk of predation.
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From the list below select all statements associated with the parasympathetic nervous system
disregard the checkmarks
Answers
The autonomic nervous system (ANS), which controls the body's unconscious processes, has three divisions, one of which is the parasympathetic nervous system (ParaNS).
The statements associated with the Parasympathetic Nervous System (ParaNS) are:
Promotes glycogen synthesisDecreases heart rateIncreases diuresisDecreases pupil diameterDecreases sweat gland activityActivity is impacted by anticholinergicsThe sympathetic nervous system (SNS), along with the parasympathetic nervous system and the enteric nervous system, is one of the three parts of the autonomic nervous system.
The statement "Shunts blood to active organs" is associated with the Sympathetic Nervous System (SNS).
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