Which cell type is not an example of eukaryotic cell

Aboy with an extra x chromosome probably has which of the following syndromes?

Why does meiosis produce cells with half the chromosomes? o a. most of the chromosomes are not necessary to keep an organism alive. b. a gamete needs only half the number of chromosomes because two gametes join together. o c. it makes the gametes easier to move around in the organism. o d. it is faster to produce gametes with fewer chromosomes.

According to the cladogram, which organisms have roundworms as a common ancestor?