Which of these is true for a fetus by the end of the first trimester of fetal
development?
OA. Its digestive system is mature.
OB. Its hands and feet have formed.
OC. Its respiratory system is mature.
OD. It has undergone significant growth.

Would really appreciate it, i have an idea but not completely sure

Aresearcher has developed two stains for use with seed plants. one stains sporophyte tissue blue; the other stains gametophyte tissue red. if the researcher exposes pollen grains to both stains, and then rinses away the excess stain, what should occur? a) the pollen grains will be pure red.b) the pollen grains will be pure blue.c) the pollen grains will have red interiors and blue exteriors.d) the pollen grains will have blue interiors and red exteriors.

Ais a group of individuals of the same that exist together in the same place at the same time