42 points --> briefly explain why each statement is inaccurate or misleading.
1) the first stage of mitosis is the duplication of the chromosomes.

2) every cell of a sexually reproducing organism has the same number of chromosomes

3)cells spend most of their time in the mitotic (m) phase of the cell cycle.

Which best example best demonstrates the importance of having knowledge of evolutionary relationships? a. illustration of a plant b. organ transplantation between species c. blood donation from a human d. do you need sequence of an insect.

Which number represents a basic ph, 4 or 9? numerical answers expected! answer for blank 1: i'll give

Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit. there is a precise compatibility between the active site and the lactose molecule. specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed. reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.