Genetic drift occurs when there is no random mating across a population. This causes a change in allelic frequency due to a random sampling of the population.
As the aboriginal population explored the earth, a small part of the population became geographically isolated either due to continental drift and climate changes. As the isolated population grew bigger, they established their own gene pool. This resulted a change in genotypic frequencies from that of the aboriginal population.
During exercise stroke volume increases because more blood is sent back to the heart due to the muscles squeezing blood in the veins
Answer:
Palisade mesophyll and guard cells. 13. Remembering the function of chloroplasts, in which part(s) of the leaf is photosynthesis taking place?
Explanation:
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The correct answer is option C, that is, mammals were able to diversify to make use of the variety of habitats that were previously occupied by dinosaurs.
Adaptive radiation refers to the comparatively fast evolution of various species from a single common ancestor. Adaptive radiation usually takes place when a species enters a novel area and distinct traits influence its existence. An illustration of adaptive radiation is the progression of mammals after the annihilation of dinosaurs.
Composed of a phospholipid bilayer.
Hydrophilic heads and lipophilic tails on the phospholipids.
