Which of the following is not a way in which carbon gases are introduced into the atmosphere?
a. forest fires
b. respiration
c. photosynthesis
d. burning of fossil fuels

Which of the following represents the chemical reaction of hydrazine and hydrogen peroxide to produce nitrogen and water? a. nitrogen + hydrogen peroxide → hydrazine + water b. nitrogen + water → hydrazine + hydrogen peroxide c. hydrazine + hydrogen peroxide → nitrogen + water d. water + hydrogen peroxide → nitrogen + hydrazine

Identify the terms using the following picture. principle of dominance item 1 can be described as the . item 2 can be described as the . the "p" represents from one parent.

Why did adult crab numbers decline in he ecosystem, even though sea stars were still available?