Q2.16. When heavily armored marine sticklebacks have invaded freshwater lakes where there are no predatory fish,their populations have evolved lighter body armor. Given what you've learned about evolution, which of thefollowing explanations for why this happens is most plausible?O Young sticklebacks only grow heavy armor when they see predatory fish in their environment.O When sticklebacks don't use their armor, it shrinks. Then they pass lighter armor to their offspring.Concentrated pollutants in freshwater lakes disrupt the sticklebacks' ability to grow armor.O Heavily armored fish grow more slowly and breed later, making armor disadvantageous in these lakes.

Sticklebacks are elongated, small fishes which reach a maximum length of around 7 inches. The…

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11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Sticklebacks are elongated, small fishes which reach a maximum length of around 7 inches.
The members of the family are manifested by having around 16 spines on their back that are placed in front of the soft-rayed dorsal fin.
The fish also have a sharp spine within the pelvic fins, a thin caudal peduncle, a squared tail, huge eyes, and a capsized mouth.
The scaleless skin is normally guarded by a different number of thin, hard bony plates located on the sides of the body.