How can two species with no close common ancestor have similar structures? What is this type of evolution called?

What are the characteristics of living things

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.

What would happen if the krill were removed from the food web