If element X has 81 protons, how many electrons does it have?

If two different animal species are found to go through equivalent stages of embryonic development until the very last stage, which conclusion would this phenomenon support? A. The two animal species are very closely related. B.

What is the physical breakdown of an algal colony to form two colonies?

List the name and letter used to represent each base in dna.

When did Democritus propose the idea of atoms?

Little Billy is terrified! He just heard a noise in his room, and he is sure that this means there are monsters coming to get him. Which part of Billy's nervous system will prepare him for fight or flight?

When did darwin arrive on the galapagos islands

A cell has 36 chromosomes. After it divides by mitosis, how many chromosomes will be in each cell?

Which of the following is not a potential concern associated with the use of biotechnology?

Explain how chromosome number is manipulated by meiosis and sexual reproduction.

When it comes to identifying the process that form rocks, the present is the key to the