Alleles are versions of a gene that will express different qualities. Multiple alleles would mean that a gene has many variations; for example, there a multiple alleles for eye color: blue, green, brown, etc. The opposite would be a gene with just two variations; an example would be simple pea plants which can have smooth or wrinkled pods.
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two characteristics of arteries and veins.
If anbody answer it will make them brainlist
What unique features do you notice about the shape of these cells? How might this improve their ability to absorb materials?
RESPOND ASAP
Certain cells need to absorb a lot of materials, such as the cell of the small intestine that reabsorbs the digested foods into the blood. These cells have external growth that facilitates the reabsorption by increasing the surface area.
What is the intestine?The intestine is divided into two parts, such as the small intestine and the large intestine, The small intestine is responsible for digestion, while the large intestine is responsible for fecal excretion. The enzymes are secreted, complete digestion happens in the small intestine, the digested food is reabsorbed into the blood, and the cells that carry out the reabsorption have external grooves called villi. These villi increase the surface area of the small intestine so that more absorption can occur and cells get enough nutrition for cellular metabolism.
Hence, Certain cells need to absorb a lot of materials, such as the cell of the small intestine that reabsorbs the digested foods, which has villi as a special feature of the cell.
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Which of the following does NOT belong as a characteristic of Eukaryotic cells?
Nucleus is present
Bacteria is an example
Includes membrane bound organelles
Cell membrane present and contains genetic material
Answer:
yes
you are right
Explanation:
membrane present and contains genetic
In a grassland ecosystem, a prolonged drought has caused depletion in food sourſes for a species of rabbit
Which of the following conditions must be met for evolution by natural selection to occur within the rabbit
population?
Some individuals in the rabbit population must evolve traits that improve their survival chances.
Some rabbits must acquire mutations that create genetic variation within the population.
Rabbits must be capable of producing more offspring than are able to survive.
Rabbits must decrease their rate of reproduction to decrease competition for resources.
In the grassland ecosystem, rabbits must be capable of producing more offspring than are able to survive, this condition must be met the evolution by natural selection to occur within the rabbit population. Thus, the correct option is C.
What is Natural selection?Natural selection is the process through which different populations of living organisms adapt and change according to the surrounding environment. Individuals in a population are naturally variable with respect to environmental conditions, meaning that they are all different in some ways or the other. This variation in population means that some of the individuals have traits which are better suited to the environmental conditions than that of others.
Rabbits must be capable of producing more offspring than they are able to survive. This conditions must be met for the evolution by natural selection to occur within the rabbit population.
Therefore, the correct option is C.
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Although the cause of Parkinson's disease is unknown,research indicates that it may be due to defective nuclei in the cells of those affected.Which of these could be studied as a direct result of having defective nuclei and may shed light on the cause of Parkinson
Answer:
Nervous System could be studied as a direct result of having defective nuclei and may shed light on the cause of Parkinson .
Explanation:
PASRKINSON DISEASE -: Parkinson's disease is a progressive nervous system condition. Several regions of the brain are affected by the condition, especially an area called substantia nigra that regulates balance and movement.
A trembling or shaking (tremor) of the limb is often the first sign of Parkinson's disease, particularly when the body is at rest. Typically, on one side of the body, the tremor starts, usually in one hand. The head, legs , feet, and face can also be affected by tremors. Other hallmark symptoms of Parkinson's disease are rigidity or rigidity of the limbs and body, slow movement (bradykinesia) or inability to move (akinesia), and impaired balance and coordination (postural instability).
Emotions and thinking ability (cognition) can also affect Parkinson's disease. Psychiatric disorders such as depression and visual hallucinations are created by some affected persons. There is also an increased risk of developing dementia in people with Parkinson's disease, which is a loss in intellectual functions, including judgment and memory.
Hence , the answer is the nervous system and other regions of brain where the disease has a direct result of having a defective nuclei and may shed light on the cause of Parkinson .
3. Describe the variation between individuals of giant tortoises found on the
Galapagos Island, and explain why.
Nitrogen is an element found in nucleic acids. Where else is nitrogen found?
A. proteins
B. lipids
C. carbohydrates
Answer:
A
Explanation:
nitrogen is a fundamental source of amino acids. And amino acids are building blocks of proteins
Which of these statements is true about autotrophs, but not heterotrophs?
Answer:
they both have some thing true about them in there definition
Explanation:
You forgot to include the answers but I'll just list out some things.
Autotrophs: An organism that produce their own energy from the sun and other natural components.
EX: Algae, phytoplankton, grass, seaweed, etc.
Heterotrophs: An organism that cannot produce it's own food and uses off other animals' energy.
EX: Dogs, fish, birds, antelopes, etc.
*Hopefully this helps you figure the answers. Since you didn't give is the solutions, we can't give you the "correct" answer. Like I said before, I'll give you some explanations.*
Imagine you are a paleontologist trying to find the "missing link" between different species. In three to five sentences, create a fictional narrative about your discoveries, describing: 1) what two species, mythical or real, you are studying, 2) what evidence you have linking these species, and 3) what evidence you have to define different correlations and causations that support your hypothesis
The "missing link" between different species. man and chimpanzee,
the evidence linking these species are their similar body structures, behavior and intellect.
Missing linkThe two species studied are men and chimpanzee, the evidence linking these species are their similar body structures, behavior and intellect.
The evidence for this discovery is that in Ethiopia in 1974 it was named Lucy (in honor of the Beatles "Lucy in the Sky with Diamonds"). Its bones date back to 3.2 million years ago. The brain was small and its height was no more than one meter.
It was classified among the Australopithecus afarensis and for a long time held the post of the grandmother of humanity.
In this question, We imagine that we are paleontologists trying to find the "missing link" between different species. man and chimpanzee, we created a fictional narrative about this discovery.
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How do veins
return blood to the
heart?
A. using simple and
facilitated diffusion
B. using osmosis and
simple diffusion
C. using capillaries and
arteries
D. using valves and muscle
contractions
Answer:
using capillaries and
arteries
Explanation:
what would happen if sister chromatids were not pulled apart at anaphase 2
Answer and Explanation: Nondisjunction occurs when sister chromatids are not pulled apart at anaphase II. This will cause both sister chromatids/ homologous chromosomes to be pulled to just one pole of the cell.
Since the anaphase I stage in Meiosis I occurred without errors, this would result in four haploid gametes being produced.
However, two of these gametes will be normal, will have the normal number of chromosomes. The other two gametes would have an abnormal number of chromosomes and be aneuploid. One would have n+1 number of chromosomes, and the other would be n-1.
NEED HELP!!!
A. What are the options for surviving a very cold winter?
B. What protective measures might be required to keep cells alive during periods of torpor?
Which of the following is NOT a structural adaptation?
camouflage
mimicry
spikes on a hedgehog
a squirrel climbing up a tree
Answer:
Camoflauge.
Explaination:
Camouflage is when a species changes to resemble its surroundings to protect itself.
Structural adaptations are physical features of an organism such as spikes on a hedgehog.
Since camoflauge is not a physical feature, it is therefore not a structural adaptation.
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Location plays a role in wetland type, but is not the sole determining factor. Please select the best answer from the choices provided T F.
The statement location plays a role in wetland type but is not the sole determining factor is true.
What do you mean by Wetland?Wetlands are areas where water covers the soil or is present either at or near the surface of the soil all year or for varying periods of time during the year, including during the growing season.
The characteristics of the fate line depend on the location primarily on its latitude and longitude. The direction and movement of the sun also affect the wetland types.
Therefore, The statement location plays a role in wetland type but is not the sole determining factor is true.
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Answer:
True!
Explanation:
What causes smog in L.A. and in Mexico City? Describe at least factors.
Describe one change to factories and power plants intended to reduce air pollution.
Describe one change to automobiles and buses intended to reduce air pollution.
Describe one way that commuters can now reduce air pollution.
What is still a major challenge to reducing air pollution in Mexico City?
What causes smog in L.A. and in Mexico City? Describe at least factors.
The smog is trapped in the valley and cannot be carried away by wind.
Describe one change to factories and power plants intended to reduce air pollution.
Reducing toxic emissions from industrial sources, reducing emissions from vehicles and engines through new stringent emission standards and cleaner burning gasoline; and addressing indoor air pollution though voluntary programs.
Describe one change to automobiles and buses intended to reduce air pollution.
Using fuel efficient vehicles, or electric vehicles.
Describe one way that commuters can now reduce air pollution.
Choose a cleaner commute, share a ride to work or use public transportation. Combine errands and reduce trips. Walk to errands when possible. Avoid excessive idling of your automobile.
How does the Amazon rainforest contribute to the health of the planet?
-It filters the circulating air of the planet.
-It protects twenty-five percent of the world’s plant species.
-It stores 100 billion metric tons of carbon.
-It produces fifty percent of the world’s oxygen.
Answer:
It protects twenty-five percent of the world’s plant species.
Explanation:
Answer:
It stores 100 billion metric tons of carbon.
Explanation:
.
Why is it important to understand human sexuality?
A. We have similar sexuality issues.
B. Eventually, we will all become mature adults.
C. There is a specific age for developing one's sexuality.
D. It will help us build a better relationship with ourselves and others.
i need help, i dont know how to do this so yea
Answer:
A= CHON or Carbon, Hydrogen, Oxygen, and Nitrogen
Explanation:
My biology teacher.
Which of the following best describes invertebrates and vertebrates? Invertebrates have a backbone and vertebrates do not. Invertebrates do not have a backbone and vertebrates do. Invertebrates and vertebrates both have a backbone. Invertebrates have a backbone in the front and vertebrates have one in the back.
Answer:
Explanation:Invertebrates are animals without spines, while vertebrates have a spine. Invertebrates are sometimes (mistakenly) thought of as primitive because of their lack of developed organs. Their simple internal systems include respiratory systems such as gills or trachea and they often use an open circulatory system to pump their blood. As invertebrates lack an internal skeletal
structure, they sometimes have an external skeleton that protects their soft bodies called an “exoskeleton.” In general, invertebrate success often comes from their ability to reproduce extremely quickly, unlike many vertebrates who take years to become fully grown.
Vertebrate animals, on the other hand, have a spine that develops from a notochord they possess as an embryo. They also have defined internal systems like complex respiratory structures, a closed circulatory system and sensory organs that build the nervous system. Vertebrates tend to be larger than invertebrates, thanks to their backbone, which allows their bodies to grow larger and move faster than many invertebrates.
The statement that best describes invertebrates and vertebrates is invertebrates do not have a backbone and vertebrates have a backbone.
What do you mean by invertebrates?Invertebrates may be defined as any animal that lacks a vertebral column, or backbone, in contrast to the cartilaginous or bony vertebrates.
Invertebrates do not possess a backbone and an internal skeleton, but they have an exoskeleton. They possess an open circulatory system. While on the other hand, vertebrates possess a backbone and an internal skeleton, but they do not possess an exoskeleton. They possess a closed circulatory system.
Therefore, the statement that best describes invertebrates and vertebrates is invertebrates do not have a backbone, and vertebrates have a backbone.
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Why are there so few third-level consumers and how does this fit with the energy pyramid? Group of answer choices because there is less energy available at the bottom of the pyramid because of the energy and heat loss at each level of the pyramid because they use the most energy competing for food in the pyramid because they have the fewest sources of food for energy in the pyramid
Answer:
because of the energy and heat loss at each level of the pyramid
Explanation:
Producers (photosynthetic beings) are the ones who are at the base of the food pyramid, and for this reason, they are the ones with the most energy availability. ,
When a primary consumer feeds on producers, the energy stored in organic compounds is transferred to him. Consumers then use ingested organic matter to produce energy, which, in turn, is used to carry out some processes for their survival. Another part of the substances ingested is lost in feces and urine.
When serving as food for another organism, primary consumers transfer their energy to that secondary consumer, and so on. Therefore, at each level of the pyramid, less energy is passed, and then less energy is available, the more difficult and competitive it becomes for subsequent consumers.
What do each of the leaves of a four leaf clover stand for.
Answer:
The first leaf represents hope, the second stands for faith, the third is for love and the fourth leaf brings luck to the finder.
Explanation:
The outer layer of bone _____.
is a thin membrane
is thick and hard
looks like a sponge
makes red blood cells
Describe the levels of organization in the body.
Cells are the smallest living part of organisms. When groups of similar cells come together, they form tissues. Groups of tissues that work together to perform a function are called an organ. Groups of organs that work together to perform a job are called an organ system. The body is made up of multiple organ systems.
The anesthesia has blocked
from carrying signals to the
.
Answer:
The
Explanationbrain:
If the Anastasia is given to prevent pain so it is put just before the brain so that the pain could not be received.
How do dna polymerase i and dna polymerase iii differ?.
Explanation:
DNA Polymerase III synthesizes the majority of the DNA, while DNA Polymerase I synthesizes DNA in the regions where the RNA primers were laid down on the lagging strand.
WILL MARK BRAINLIST IF CORRECT PLEASE ANSWER FAST!!!!! _______________ has lots of nutrients but does NOT allow water or air to pass through
Answer:
the skin on your body
Explanation:
because it is a tough cover it protects the body in many ways,thus it's water proof.
In a Punnett square for a two-factor cross, is it possible for all of the offspring to be identical?
Explain why or why not.
In a Punnett square for a two-factor cross, it is not possible for all of the offspring to be identical.
The Punnet square simply refers to a square diagram that's used for the prediction of the genotypes of a breed. The diagram is usually used by biologists in order to determine the probability of the genotype of an offspring.
For example, if there's a dominant and recessive genes represented as B and b. When they're crossed, the offsprings that are gotten will be BB, Bb, Bb, bb.
From the above, it shows that in a Punnett square for a two-factor cross, it is not possible for all of the offspring to be identical.
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Why do cells have a maximum diameter of slightly over 100 micrometer
Cells have a maximum diameter of slightly over 100 micrometer due to chemicals or mutation.
Why cells have a maximum diameter of slightly over 100 micrometer?Prokaryotic cells diameter ranges from 0.1 to 5.0 micrometers (μm) which are smaller than eukaryotic cells, which have diameters ranging from 10 to 100 μm.
Some cells have attain the diameter of over 100 micrometer which may be due to mutation or exposure to chemicals so we can conclude that Cells have a maximum diameter of slightly over 100 micrometer due to chemicals or mutation.
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ASAP Choose ALL that apply for neap tides
Lesson 3. 01
Moon, Sun, and Earth are in alignment
Moon and Sun are at right angles to the Earth
Gravity of the Sun and Moon work against each other
Smaller than normal range of high and low tides.
Answer:
moon, sun, and earth are in alignment
List the four stages of coal formation.
Answer:
eat, lignite, bituminous, and anthracite.
Explanation:
The stage depends upon the conditions to which the plant remains are subjected after they were buried: the greater the pressure and heat, the higher the rank of coal.
Answer:
There are four stages in coal formation: peat, lignite, bituminous, and anthracite.
Explanation:
Stage one: Peat is the first stage in the formation of coal. Normally, vegetable matter is oxidized to water and carbon dioxide. However, if plant material accumulates underwater, oxygen is not present and so only partial decomposition occurs. This incomplete destruction leads to the accumulation of an organic substance called peat. Peat is a fibrous, soft, spongy substance in which plant remains are easily recognizable. It contains a large amount of water and must be dried before use. Therefore, it is seldom used as a source of heat. Peat burns with a long flame and considerable smoke.
Stage two: Lignite, the second stage, is formed when peat is subjected to increased vertical pressure from accumulating sediments. Lignite is dark brown in colour and, like peat, contains traces of plants. It is found in many places but is used only when more efficient fuel is not available. It crumbles easily and should not be shipped or handled before use.
Stage three: Bituminous Coal is the third stage. Added pressure has made it compact and virtually all traces of plant life have disappeared. Also known as “soft coal”, bituminous coal is the type found in Cape Breton and is our most abundant fuel. It is greatly used in industry as a source of heat energy.
Stage four: Anthracite, the fourth stage in coal formation, is also known as “hard coal” because it is hard and has a high lustre. It appears to have been formed as a result of combined pressure and high temperature. Anthracite burns with a short flame and little smoke.