Why is bacteria a necessary part of the nitrogen cycle

In what type of star would helium be converted to carbon as the final stage of fusion?

Some communities have banned detergents containing high levels of phosphates because: Phosphates kill algae and disrupt normal food webs in lakes Phosphates cause chemical reactions that increase the temperature of the water Phosphates are not

GMU professors in Biology/Medicine area founded companies or are the members of Scientific Advisory Boards of the companies.

Cellular is all of the chemical reactions in cells

An allele is a form of a gene. In the cross HhSs x hhss, how many alleles does a kitten inherit from the mother? How many alleles does a kitten inherit from the father?

What structure on the continental crust is most similar to an ocean ridge? -Plains -Mountain range -Canyon -Plateau

Which of the following affects the speed of light waves in a material? Angle at which the ray strikes the medium Color of the material Density of the material Temperature of the light wave

Describe the relationship between organic compounds, nucleotides, RNA, and a universal genetic code.

What is the best description of the chromosomes by the end of prophase of mitosis? The chromosomes are pulled to opposite sides of the cell. The chromosomes have coiled and become more compact. The chromosomes have separated at the centromere.

Members of the phyla Cnidaria and Bryozoa both have a circle of tentacles, which they use for feeding. Besides the difference in size, how else do these feeding structures differ?