Which macromolecule is often made of three fatty acids bound to a glycerol molecule?

What major structure can be used to tell apart the embryos of acoelomates pseudocoelomates and coelomates?

Natalie had random hand movements when she was two months old. when she was six months old, she used to grab a block with her whole hand. now at the age of ten months, she can grasp the same block with her thumb and forefinger. this sequence of growth in her hand and finger movements is according to the pattern.

If the frequency of the p allele is .63 in the population then what is the frequency of the q allele?