Answer: Somatic cells divide by __mitosis__ to provide two identical daughter cells that look like the original cell while sex cells divide by __meiosis___ to provide four different daughter cells.
Explanation:
Somatic cells are non-sex cells, so mitosis is the answer for the first blank, since mitosis does not make sex cells. Meiosis does, so the answer to the second blank should be meiosis. Also, meiosis yields four daughter cells while mitosis yields only two, so the answers given should make sense.
The pair of characteristics that one must use to classify a fish is the presence of jaw and skeleton type. Agnatha fishes are also called jawless fishes and they lack bony skeletons. Cartilaginous fishes are composed of cartilage skeletons. Bony fishes have bony skeleton structures.
