The primary human source of greenhouse gases in earths atmosphere is:

a. Photosynthesis

b. The mining and burning of fossil fuels

c. the use of aerosol sprays

d. the removal of fossils

One similarity between DNA and messenger RNA molecules is that they both contain?

Which life characteristic describe a long-term response to the environment

Explain how primate hand features increase fitness and give one example. When writing about your example name the hand feature that you have chosen and explain clearly why it increase fitness in a tree environment.

What is the pH of milk? Is it an acid, base, or neutral?

Explain how the allele for sickle cell disease, which is a harmful allele when a person is homozygous, can be beneficial when a person is heterozygous.

How many different types of gametes can be produced by a plant with genotype aabbccddeeff?

What forms the rungs of the ladder of DNA?

Cuticular scale patterns in human head hairs tend to be very regular. Group of answer choices True False

Does Mitosis ever stop in cells? Explain your answer

Trichodesmium is a nitrogen-fixing cyanobacteria. Why might this cyanobacteria be important to other organisms in nitrogen-poor waters? They convert atmospheric nitrogen (N2) to organic compounds including ammonia (NH3).