Which statement is false?
a. populations with more genetic diversity are less likely to suffer from inbreeding.
b. selection pressures can change over time.
c. giraffes that stretch their necks more than other giraffes will have babies with longer necks.
d. natural selection acts on individual organisms.
e. adaptive traits allow individual organisms to better survive and reproduce.

c. Giraffes that stretch their necks more than other giraffes will have babies with longer necks.

Explanation:

Giraffes that stretch their necks will not have babies with longer necks. A trait only shows in next generation if it is genetically inherited i.e. the gametes carry the trait to the next generation.

When giraffes stretch their necks, they are modifying their actions in their life time which will have no effect on the gametes. Hence, this trait wont be passed to the next generation and babies will not have longer necks.

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation: