Question

multiple choice 6.15 points
which of the following explains the absence of legs in snakes being similar in form to the absence of legs in a lamprey?
none of the above.
homology
evolutionary reversal
evolutionary convergence

Explanation:

Homology refers to similar structures due to common ancestry. Snakes and lampreys do not share a recent common - ancestor with legs that they both lost. Evolutionary reversal implies returning to an ancestral state, which isn't applicable here as they don't have a recent legged ancestor. Evolutionary convergence occurs when different organisms independently evolve similar traits due to similar environmental pressures or ecological niches. Snakes and lampreys independently evolved leg - less forms for different reasons related to their life - styles and habitats.

Answer:

Evolutionary convergence