4)
the forelimbs of manatees, penguins, seals, and sea turtles are all flipper-shaped. this is an example of
convergent evolution to a structure permitting movement in water.
natural selection to a structure permitting movement in water.
adaptations to eating fish.
inheriting a common trait from a recent common ancestor.
selective breeding for the flipperlike forelimbs by humans.

Option (A)

Explanation:

Convergent evolution may be defined as the independent evolution of similar features in different species. This evolution shows analogous structure that perform similar function but do not have a common ancestor.

Penguins, sea turtles and manatees forelimb is an example of convergent evolution because similar forelimb structure evolution has occurred in different species lineage. The convergent evolution of forelimb structure in these species permit movement in water.

Thus, the correct answer is option (A).

this protocol provides a detailed procedure for nucleoprotein extraction from cultured cells and tissues in an efficient manner.

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times