Many crustaceans (for example, lobsters, shrimp, and crayfish) use their tails to swim, but crabs have reduced tails that curl under their shells and are not used in swimming. this is an example of . natural selectionb. an adaptationc. a homologous structured. a vestigial trait

a vestigial trait

Explanation:

Vestigial trait is a characteristic that is present in an organism but not used for the intended purpose. For example: vestigial organs. These structures are in their rudimentary form and almost degenerated because they are not required anymore by the organism.

Many crustaceans use their tails to swim and hence have functional fully formed tails. However crabs usually walk on ocean beds. Crabs that do swim have modified rear legs. Hence, there is no requirement of a functional tail in crabs making it a vestigial trait. As a result, the tail is reduced and curled under their shells.

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles

the framers of the constitution insisted that federal judges be nominated instead of elected due to their desire to have judges above the shifting whims of the masses.

the hope, whether achieved or not, was that federal judges would only be beholden to the law and that by not having judges be elected, they would be protected if that law dictated an outcome that ran counter to popular opinion.