The fact that fish, penguins, and dolphins all have the same basic shape is best explained by which of the following?

a) the basic shapes of fish, penguins, and dolphins are vestigial structures.

b) fish, penguins, and dolphins all faced the same physical constraints during their evolution andconverged upon the same body plan.

c) divergent evolution and adaptive radiation into new niches often result in convergent evolution.

d) the similarities are probably due to random chance.

e) parallel evolution is common among aquatic mammals

I would say it is E.

Explanation:

because fish, penguins, and dolphins are aquatic animals. It can't be A. because if it were vestigial it would be useless. It can't be B even though it does seem like the right answer because the are all aquatic. It can't be C. because it would been that the same species would have the same niche which is not possible. It can't be D. because every organism is evolved from a common ancestor.

B) Fish, penguins, and dolphins all faced the same physical constraints during their evolution and converged upon the same body plan

Explanation:

q: compare the parts of a cell and the cell as a whole to another common nonliving system (i.e., a car, a city,

a:

comparing this to the inside of a food building/company.

all cells are surrounded by a plasma membrane, which protects the cell from its environment, keeping toxic substances out of the cell. it regulates which molecules are allowed to enter and exit the cell.

regulates all cell activity such as cellular metabolism, and growth in addition to storing and maintaining the cell's dna for transcription and replication. determines what proteins to make.

contains the organelles; site of most cell activity

the place where ribosomes do their working activity.

builds the proteins.

prepares proteins for use or export.

responsible for breaking down and absorbing materials taken in by the cell.

maintains cell shape.

transforms one form of energy into another.

atp is used for energy.