Cholera develops when the bacterial toxin

Geologic time A. has not ended. B. began after the Precambrian. C. ended after the Cenozoic era. D. has recently paused.

Before Mitosis begins, a cell produces an exact copy of its A. Gametes B. Cell Wall C. Chromosomes D. Nucleus

Why are swollen lymph nodes a sign of infection? O A. Memory cells are stored in the lymph nodes. O B. Infections cause increased lymphocyte production. O C. Bacteria and viruses mostly attack the lymph nodes. O D.

A man of blood group B is being sued by a woman of blood group A for paternity. The woman's child is blood group O. Could the man be the father of the child? Explain. Support with a cross. (Punnet Square)

Dna is a specialized carbohydrate contained within cells. true or false

Which statement best describes the relationship between activation energy and rate of reaction? O Increasing the activation energy can increase the rate of a reaction. O Reducing the activation energy can increase the rate of a reaction.

Definition: this is a haploid cell with half the reproductive information from the parent.

Does a cell use energy when molecules diffuse in or out of the cell? Why?

Below is a list of possible challenges. Check all errors that you mentioned in your answer. Traits other than beak type might affect natural selection. It could take many generations to observe adaptions to a population.

A farmer dug a well but did not find any water Which reasons most likely explain why the farmer did not find water? Check all that apply.