Gene flow is one force that can cause evolutionary change. Which example best illustrates gene flow?

1 answer:

8 0

Gene flow also know as gene migration is the transfer of genetic variations or characteristics from one population to another. The gene flow can be well illustrated using a flock of geese. A flock of geese migrate and enter into the territory of another flock of geese and start interbreeding. This will result to transfer of the different genes into the off springs.

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True or False. Animals vary tremendously in structure. Nevertheless, they can be categorized into a few basic body plans based o

NNADVOKAT [17]

Answer:

True

Explanation:

Animals can be categorized into 3 based on body symmetry

Those without any body symmetry (asymmetrical)
Those with bilateral body symmetry (bilateria)
Those with radial body symmetry (Radiata)

Animals can be categorized into 2 based on number of embryonic germ layer;

Those with two layers - endoderm and ectoderm (diplobastic)
Those with three layers - mesoderm in addition to ectoderm and endoderm (triploblastic)

Animals can be categorized based on presence/absence of body cavity or coelom;

No body cavity - acoelomates
False body cavity - pseudocoelomates
True body cavity - coelomates

Animals can be categorized into 2 based on characteristics of embryonic development;

Deuterostomes
Protosomes

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The process by which the organisms that are better adapted to the environment survive and reproduce is called

aleksley [76]

Answer:

Natural selection

Explanation:

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what is a generalized term for organs in animals which produce sex cells? A. gametangium B. antheridium C. testis D. gonad

fgiga [73]

The answer is choice d.

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The large surface area in the gut directly facilitates _____.

Flura [38]

Answer:

B. Absorption

Explanation:

Absorption is a process that takes place in the small intestines or ileum of the GI tract, in which simple and soluble nutrients are absorbed into the blood stream.
Absorption is enhanced by several adaptations of the gut such as large surface area of the gut which directly facilitates absorption of nutrients.
Presence of villi and microvilli in the gut increases the surface area for absorption of nutrients in the ileum.

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kirill [66]

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