a region of dna that contains instructions for the amino acid sequence of a particular protein is called a(n)

Use this diagram of an animal cell to answer the question. where does the first stage of cellular respiration occur? w x y z

The energy needs of a human population are not affected by

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.