Models need to be changed when

a.) they are based on experimental data.
b.) scientific understanding changes.
c.) they represent a phenomenon.
d.) they are designed to answer a question

Why do carbohydrate molecules function so well as fuel for the body?

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.

Mike has a problem with his testosterone. he is unable to produce enough. which will most likely be affected by his inability to produce testosterone? check all that apply.