I believe the answer is a
Answer:
ok so i think the X shape is a chromosome, that blank space in the big spot is calleed a nucleas. The arrow on the top right is a cell, the bottom right is base pair, the bottom left is dna and the top middle is called the gene.
Explanation:
A challenge to traditional (pre-1860) ideas about species came from embryology, when it was discovered that embryos of dissimilar organisms, such as sharks and humans, resemble each other. Embryology involves the study of the formation and the development of an embryo and the fetus. It is one type of evidence of evolution such that the embryos of many different kinds of animals, mammals, reptiles, birds, fish among others, are similar showing a common ancestry.
