This is the one factor that is changed or tested by the person doing the investigation.

Which is an advantage of sexual reproduction over asexual reproduction? A) increased number of organisms and decreased genetic variation B) increased genetic variation C) doesn't require an organism to find a mate D) decreased genetic variation E)

Why is Mt St. Helens an example of succession?

Which are products of nitrogen fixation? O A. Phosphorus, nitrates, nodules O B. Oxygen, carbon, water O C. Nodules, roots, fertilizer O D. Ammonia, nitrates, nitrites

Is aminalia unicellular or multicellular?

Which type of logging results in the most diverse regrowth? A old growth B pulp logging C clear-cutting D selective cutting

What are the 3 care instructions for future life on earth

If many trees are removed from a forest by logging, what is themost immediate effect on the carbon cycle in that forest? A. increased rates of decomposition B. decreased rate of atmospheric CO2 C. decreased combustion of fossil fuels D.

How many of Earth's plant species are used as agricultural crops? A) 1,000 B) 3,000 C) 5,000 D) 7,000 E) 9,000

Dendrites are branching cytoplasmic projections of neurons that receive impulses and transmit them to the cell body. a. True b. False

What is the difference between a reactant and a product?