Question

question 2 1 pts by the end of a normal first trimester, the zygote has gained about 50 percent of its birth weight. has developed recognizable arms and legs. has reached its birth length. has not yet developed visible limbs.

Explanation:

During the first trimester of pregnancy, the embryo (not just a zygote anymore as the zygote stage is very early - but assuming the question uses the term loosely) develops recognizable arms and legs. It doesn't gain 50% of birth weight (most weight gain is in the third trimester), doesn't reach birth length (length also increases significantly later), and does develop visible limbs.

Answer:

has developed recognizable arms and legs.