The nematode Caenorhabditis elegans has allowed scientists to develop "fate maps" tracing cell lines back to cell origins. The trait of nematodes and some other related groups where they have a set number of cell divisions leading to the same number of body cells in an adult is called:

A) anisogamy.
B) apoptosis.
C) cryptobiosis.
D) gastrulation.
E) eutely.

E. Eutely

Explanation:

Nematodes is also called Nemathelminthes. They are small slender worms and the head of a nematode is noticeable when compared to other parts of their body. The head is radially symmetrical while the body is bilaterally symmetrical.

Eutely is however the condition of having a body made up of a constant number of cells usually somatic cells like in the case of certain rotifers and lower worms.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

the answer is sex-linked recessive.