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Andru [333]
3 years ago
12

What are the mechanisms of natural selection, and how do they lead to changes in

Biology
1 answer:
Nata [24]3 years ago
5 0

Darwin's proposed mechanism for evolution is natural selection. Natural selection allows species to respond to their surroundings through time, or to become progressively excellently-suited. Natural selection is environmentally based and involves established heritable variation within a population.

They lead to changes in  species over time:

  • Darwin suggested species will evolve over time, new species originate from pre-existing species, and all species share a common ancestor with each other.
  • In this framework each organism has its own special set of heritable i.e genetic variations from the common ancestor that have slowly developed over very longer periods of time.
  • Parroted branching activities that isolate new species from a common ancestor create a multi-level tree that connects all living organisms.
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While many non-avian dinosaurs achieved gigantic sizes, the Sauropods were the true giants of the Mesozoic. in fact, the largest
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Answer:

The correct answer is option d. "a and b".

Explanation:

Plenty of methods had been developed to estimate the body size of dinosaurs such as the gigantic Sauropods. One of the first estimations that paleontologists used was the  Archimedes principle, consisting in dunking the entire skeleton of a Sauropod into a pool of water and measure the water displacement or more precisely small dinosaur models. However this method requires the preservation of almost the entire skeleton. A more used and useful method is to measure the length of the legs from the hip to the foot and using a 2/3's power relationship convert that to a mass. This method is more used since it only requires a couple of leg bones, which are often well preserved.

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3 years ago
What are known causes of epigenetic effects, and how do they
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Answer:

Epigenetic effects can be caused by DNA heterochromatin and/or histone silence or activate.

As such, they can different chromosomes or certain chromosomal regions and be responsible for parental imprinting or influencing gene activity in oxidation and reduction.

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Explanation:

Cells acquire various patterns of gene expression during differentiation to adapt to a changing environment. Epigenetic and genetic alterations are considered as two independent mechanisms that participate in the onset and progression of cancer. Epigenetic mechanisms can be as important for biological events as genetic mechanisms, which do not imply a change in the DNA sequence, but do have an important role in the modification of gene expression.

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What would happen to the mountain lion population if the deer became extinct?
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The relationship between the remora is and the shark is an example of
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Answer:

An example of mutualism is the relationship between remora and shark.

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Remora depends on sharks for food and locomotion. It has a sucking mouth that helps it to attach itself to the shark.

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