Answer:
Sexual reproduction was an early evolutionary innovation after the appearance of eukaryotic cells. The fact that most eukaryotes reproduce sexually is evidence of its evolutionary success. In many animals, it is the only mode of reproduction. And yet, scientists recognize some real disadvantages to sexual reproduction. On the surface, offspring that are genetically identical to the parent may appear to be more advantageous. If the parent organism is successfully occupying a habitat, offspring with the same traits would be similarly successful. There is also the obvious benefit to an organism that can produce offspring by asexual budding, fragmentation, or asexual eggs. These methods of reproduction do not require another organism of the opposite sex. There is no need to expend energy finding or attracting a mate. That energy can be spent on producing more offspring. Indeed, some organisms that lead a solitary lifestyle have retained the ability to reproduce asexually. In addition, asexual populations only have female individuals, so every individual is capable of reproduction. In contrast, the males in sexual populations (half the population) are not producing offspring themselves. Because of this, an asexual population can grow twice as fast as a sexual population in theory. This means that in competition, the asexual population would have the advantage. All of these advantages to asexual reproduction, which are also disadvantages to sexual reproduction, should mean that the number of species with asexual reproduction should be more common.
However, multicellular organisms that exclusively depend on asexual reproduction are exceedingly rare. Why is sexual reproduction so common? This is one of the important questions in biology and has been the focus of much research from the latter half of the twentieth century until now. A likely explanation is that the variation that sexual reproduction creates among offspring is very important to the survival and reproduction of those offspring. The only source of variation in asexual organisms is mutation. This is the ultimate source of variation in sexual organisms. In addition, those different mutations are continually reshuffled from one generation to the next when different parents combine their unique genomes, and the genes are mixed into different combinations by the process of meiosis. Meiosis is the division of the contents of the nucleus that divides the chromosomes among gametes. Variation is introduced during meiosis, as well as when the gametes combine in fertilization.
Explanation:
By the end of this section, you will be able to:
Explain that variation among offspring is a potential evolutionary advantage resulting from sexual reproduction
Describe the three different life-cycle strategies among sexual multicellular organisms and their commonalities
Understand why you could never create a gamete that would be identical to either of the gametes that made you
Complete the diagram pictured on the right by identifying each missing label.
A blank
WILL GIVE BRAINLY IF CORRECT!! REPORT RANDOM ANSWERS!! ASAP!!
1. Which statement is NOT true regarding the above picture?
A. Cave fish live in the dark, and therefore no longer needed the adaptational advantage of needing eyes
B. It is not possible that these two fish came from a common ancestor.
C. Cave fish developed different adaptations from minnows because of their surrounding environment, like sensitivity to vibrations.
D. Minnows would not be well adapted for extremely dark environments.
2. What type of evidence of evolution does the above picture represent, when you notice the presence and lack of eyes in the minnow & cave fish?
A. Eyes must be a Homologous structure
B. Eyes must be an analogous structure
C. Eyes must represent biochemical evidence
D. Eyes must be a vestigial structure
ANSWER
number 1. B
number 2. A
im not 100% sure so please think about it before answering.
The presence and lack of eyes in the minnow & cave fish shows that eyes must be a Homologous structure.
Evolution is the stepwise process by which contemporary organisms emerged from earlier ancestors. We must note that organisms that evolved from the same ancestor must share some structural and functional similarities. Hence, it is not possible that these two fish came from a common ancestor.
A homologous structure is a structure that is present in two species that come from a common ancestor. Hence, the presence and lack of eyes in the minnow & cave fish shows that eyes must be a Homologous structure.
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Exchange surfaces are surfaces that are adapted to maximise the efficiency of ______ and solute( a substance dissolved in a liquid) exchange across them
Answer:
gas
Explanation:
Answer:
Explanation:
Gasssssssss is the answer have a great dayxx
What is the product of meiosis I?
Answer:
Meiosis I, a reductional division of two haploid cells produces offspring cells that are not genetically identical with the event of recombination. Haploid girl cells have half the original/parent cell chromosomes.
Explanation:
meiosis II, an equational or mitotic division, divides the haploid cells created in meiosis I to produce four identical daughter cells that ultimately form the male/female gametes (egg/sperm).
Here chromatids split in contrast to meiosis I when homologous chromosomes apart.
Please look at the picture and answer I will mark brainliest if right
Answer:
can't see the simulation so can't answer properly, most populations are in equilibrium is I had to guess unless some external force is applied which could be a change in environment or change in predatory pressures
Explanation:
What are alternative resources
Answer:
Alternative energy refers to energy sources other than fossil fuels (such as coal, petroleum, and diesel) and includes all renewable and nuclear energy sources.
Explanation:
Which of the following can we get from plant stems? A. flax seed B.cotton C.carrots D.hay
Answer:
Hay
Explanation:
I got 100% on the quiz, hay it is!
The product we can get from the plant stems are hey. Thus, option D is correct.
What are stems?Stems are considered as very important part of the plant and this is long in structure and green in color and it consist of branches, leaves and flower is also grow on the branches that has been attached to the stem.
Leaf has been considered as very important part of the plant and it has contained the chlorophyll due to which the color of the leaf is green. It has a flattened green structure which has been grown outwards from the stem of a plant which has vascular.
Leaf has been known as the basic site of the process of photosynthesis and it means that the process of the photosynthesis generally occurs in the leaf. The main function of the leaf has to produce food material for plants which will help plants to get nourished.
Therefore, The product we can get from the plant stems are hey. Thus, option D is correct.
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What is Alligator/ploverbirds relationship
Answer:
The ploverbird and alligator have a symbiotic relationship.
Explanation:
The ploverbird cleans the alligators teeth in order to eat and the alligator gets a dental checkup so they both benefit from the relationship.
Why are lab safety rules important? I’m currently doing an essay with minimum of 250 words. You don’t really have to do that but can y’all give me some facts/ideas to put in my essay? Thank you and good day <3
Answer:
Explanation:
I know that Lab Safety Rules are important because laboratories have a wide array of safety hazards, which is why it is so important to understand the important of lab safety. By becoming familiar with the laboratory you're working in and always following proper safety procedures, you can help to prevent or eliminate hazards.
Say you were traveling up a mountain, where would you have the most trouble breathing? At the bottom of the mountain or at the top of the mountain? Describe why.
Answer:
top of the mountain
Explanation:
the air pressure on top of a mountain is really bad so it is harder to breathe
A bacterium can reproduce quickly by splitting into two cells. Which of these best describes the genetic make-up of the resulting two cells?
a/They have the same amount of genetic material and are identical.
b/They have the same amount of genetic material but are not identical.
c/They have half the amount of genetic material, which grows in size.
d/They have half the amount of genetic material, but then it duplicates itself.
Answer:
A . They Have The Same Amount Of Genetic Material And Are Identical
Explanation:
Animals can either be unicellular or multicellular depending on the species
True. Things such as a sponge, placozoa and stuff can be unicellular. But other bigger animals are multicellular, like a whale or dog.
Answer:true
Explanation:
Students are studying ecosystems and the relationships between abiotic and biotic factors in an environment. The students find that the ecosystem in an area has changed over time. They wonder if a change in an abiotic or biotic factor can cause a change in the ecosystem forming a new ecosystem. Which three statements provide evidence that a change in abiotic or biotic factors can cause a new ecosystem to form?
Answer:
C, D, and E
Explanation:
Due to technical problems, you will find the complete explanation in the attached files
I need help plz !!!!!!!!
Answer:
ur correct its measured in A
Answer:
I believe its A for Amperes
Explanation:
PLS HELP!! ILL MARK BRAINLIEST
1.
Why, as a biology student, do you need to know Chemistry?
2.
What is the radius of a Carbon atom?
3.
Where is the majority of the mass of an atom found?
4.
Describe the location and charge of a proton.
5.
Describe the location and the charge of a neutron.
6.
Describe the location and charge of an electron.
I
7.
Like charges
8.
Unlike charges
9. What are the three names commonly used to refer to the places where electrons can be
found?
10. Approximately,
manmade.
elements are found naturally on Earth. The others are
11. How does the Periodic Table organize elements? (2 answers)
Answer:
1. While Biology is the study of living things, living things themselves are made up of chemical composition. Our survival is dependant on the reactions taking place inside and outside the body. Hence, to understand living things, biologists needs a good understanding of chemistry.
2. 170 pm is the radius of a Carbon Atom.
3. The vast majority of the mass of an atom is concentrated in its nucleus
4. Protons are found in the nucleus of the atom. This is a tiny, dense region at the center of the atom. Protons have a positive electrical charge of one (+1) and a mass of 1 atomic mass unit (amu), which is about 1.67×10−27 kilograms.
5. Neutrons are located with protons in the nucleus; they too exchange mesons with protons and with each other to form the strong nuclear force, but they do not have to overcome the repulsion from Coulomb forces since neutrons are not charged.
How did you determine if your predator/prey relationship was stable? What was your dependent variable? What type of measurements or observations need to be recorded during your investigation? What was your control? How will you reduce errors? What type of calculations need to be made?
Answer:
However, if the size of a prey population gets tooo small, many of the predators may not habe enough food to eat and will die... S predator-prey population size relationship that results in both populations survivng over time, despite flucuations in the size of each one over several generatisn as described stable
Explanation:
What are igneous rocks made of
A. a moisture of materials made from both living and no living processes
B. Materials that crystallized from magma or not lava, not from once living things
C. Materials that came from living things and that accumulated on the sea floor
D. Fossil fuels and other materials that came from once living things
Answer:
B
Explanation:
Igneous rocks are formed by the solidification of magma or lava.
Answer: Igneous rocks are made of B. materials that crystallized from magma or not lava, not from once living things
Explanation: Igneous rocks are formed from the solidification of magma, which is a hot (600 to 1,300 °C, or 1,100 to 2,400 °F) molten or partially molten rock material. Earth is composed predominantly of a large mass of igneous rock with a very thin veneer of weathered material—namely, sedimentary rock.
a crow vending machine is associated with what type of learning
Sorry you've waited so long for an answer! I belive the type of learning associated with a crow vending machine is trial and error! So sorry once again!
Fill In The Blank
What is the strongest acid listed in 2-2?
What is the weakest acid listed in 2-2?
What is the strongest base listed in 2-2?
Answer:
Strongest acid is hydrochloric acid
Weakest acid is rainwater
Strongest base is sodium hydroxide
Explanation:
pH is defined as the measure of hydrogen ion concentration in a particular solution. pH values seen between 0 and 1 are actually known to be strongest acids. Weakest acids are the ones that move towards neutrality. The neutral pH value is 7.0.
Looking at their pH values, we will discover that hydrochloric acid is the strongest acid. Rainwater is weakest acid because it moves towards neutrality. Sodium hydroxide is the strongest base.
In pH, values between 0-6 are referred to being acidic, 7 is neutral and while 8-14 are basic.
Answer:b
Explanation:
Completa la frase: He descubierto que, para lograr una solución ante el conflicto, sin dañar a otra persona yo:
Answer:
Hablar directamente.
Explicación:
He descubierto que para lograr una solución al conflicto, sin dañar a otra persona, tengo que hablar directamente con la persona que es la única solución para terminar con el conflicto entre dos partes. Hay cinco estrategias de resolución de conflictos que la gente puede utilizar para evitar el conflicto, que son evitar, derrotar, comprometer, acomodarse y colaborar. Mediante el uso de estas estrategias podemos prevenir conflictos de cualquier tipo.
How is local weather influenced by global patterns of atmospheric movement?
Answer: A mountain range in the path of prevailing winds can influence where precipitation falls. When humid winds blow from the ocean toward coastal mountains, they are forced to rise. The rising air cools and its water vapor condenses, forming clouds.
Which best describes a controversial issue associated with the use of genetically modified crops?
A. The use of genetically modified crops to increase potential yield
B. The short-term use of genetically modified crops in famine-stricken countries
C. The development of genetically modified crops which are resistant to herbicides
D. The long-term effects which may arise from the use of genetically modified crops
Answer:
It's D
+jjjjjjjjjjjjjhj
The long-term effects which may arise from the use of genetically modified crops is a controversial issue associated with the use of GM crops. They are reported to be having serious health impacts.
What is genetically modified crops ?Some crops are designed using genetic techniques to insert them some desired characteristics such as microbial resistant, high yield, taste, bigger size etc. Genetic engineering techniques such as CRISPER genes are common today to modify the crops in order to meet the desired features.
Genetically modifying food is a relatively new process, thus it is unclear how it will affect food safety in the long run. Human health is a major concern with regard to the drawbacks. While study is ongoing, scientists have not yet demonstrated that eating GMO foods is unhealthy.
Allergic reactions, genetic changes, devastations of good insects and their diversity etc. are the drawbacks of GM crops. Some even leads to cancer. Hence, option A is correct.
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Which of these BEST desnibes the structural difference between the DNA of bactena and the DNA of humans?
Human DNA is much more complex in structure
Bacteria do not have DNA so there is nothing to come
ADNA made of the same components so there would be no difference
Bacteria DNA com 3 toge buses while the human DNA contains
Answer:
Human DNA is much more complex in structure
are the anthers in this flower located above or below the stigma
Answer:
Above
Explanation:
The anthers are always above the stigma.
Anthers in this flower located always above the stigma are the anthers, the primary reproductive component of the flower, anthers are where male gametes are dispersed.
What are the anthers in flowers?The pistil refers to all of the female components. The stigma, which is a sticky surface open to pollen, is found at the top of the pistil.
A pollen-containing unit is another name for it, the angiosperms' stamens contain it. A filament or stalk, which resembles a thread, supports the object.
Therefore, anthers are where male gametes are dispersed. The top anther and the stalk or filament that supports it are what are known as the masculine components of the flower, or stamens.
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2.
A cell detects that it had depleted its stores of Ca2+ Which of the following would not help the cell regain homeostasis?
(A) O Increasing the number of chloride ion channels on the cell membrane
(B) O Releasing a hormone that prompts the breakdown of bone to release calcium
(CO Signaling the intestine to absorb more calcium from food
(D) O Decreasing processes which require calcium
Come Back to This I'm guessing Remove My Choice
Answer:
(A) O Increasing the number of chloride ion channels on the cell membrane
Explanation:
This is because options B, C and D require processes which make calcium available for the cell and homeostasis is the process of returning the cell back into its stable condition.
All other options except A do not help the cell return to its stable condition.
So, the answer is A
what are the symbiotic relationship between maple tree and birch tree plss help rn
Answer: A mutualistic relationship between the mycorrhizae and the roots of the trees. ... What is the difference between Pine Trees and Maple Trees? ... or wherever else Birch trees are common (they have a symbiotic relationship with birch trees).
Explanation:
Name the disease in which:
a) A person fears from water
b) Yellowing of skin takes place
Explanation:
pagal jjhgghg fossil hjiuyyyyyyyyyyyyyyyyyy
Explain why there is such a large difference between the amount of protein
found in the plasma of the glomerulus and the amount of protein found in the
filtrate.
how many orbitals/energy levels does sodium have?
Answer:
sodium has 11 protons and 11 electrons.
Explanation:
There are 2 electrons on the first energy level, 8 electrons on the second level, and 1 electron on the third energy level.
Water absorbed by the roots moves through the stem and enters the leaves. Most of this water is lost in transpiration. Explain how the internal structure of leaves results in the loss of large quantities of water in transpiration