9. What are the 4 bases that make up the rungs of the DNA ladder?

The products of cellular respiration are the

What happened to David when they crashed

2. In natural selection, the selective agent (the factor that decides which inc survive and which do not) is the a. humans b. mutations c. breeders d environment

How do scientists use sea floor spreading to study the age of the sea floor

15. Describe staph, strept, and diplo:

Assuming that there are only two alleles at a given locus, if the frequency of one allele is 0.6, what is the frequency of the other allele? A. - 0.6. B. 0 C. 0.4 D. 0.6 E. 1

How do cells acquire positional information about their location in a developing embryo?

Which kind of solution is the concentration of solutes the same inside and outside if the cell

Identify the two primary fluids found within the eye. which one of these fluids provides nutrients to the rest of the eye

How are microscopes advantageous to scientist? name two examples when a biologist (or other scientist) may use a microscope?