What is it called when scientists carefully examine a new result by someone else in this field of study

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.

Discuss cell surface transport in the structure of constituents

How far away is the nearest black hole from earth?