List 2 ways scientists can observe the earth.

Which two terms are things that are found in the chloroplast

Drosophila melanogaster have four pairs of chromosomes. a. what is the ploidy level at metaphase ii of meiosis? a. 8n b. 1n c. 4n d. 2n e. 0n b. what is the ploidy level at prophase of mitosis

Average velocity can be calculated by dividing displacement over what? Question 7 options: change in time change in distance change in mass change in density

All organisms contain and require it to survive.

An antigen is A. a molecule that reacts specifically with an antibody or immune lymphocyte. B. the variable region of an antibody C. the constant region of an antibody D. a cytokine. E. None of these choices are correct.

Explain why most quartz is useful?

What is the pattern of expression for autosomal genes?

The process by which the particles of a gas randomly pass through a tiny opening is called

What is an unusual defense some lizards have developed to protect themselves?

What types of cells have half the number of chromosomes?