Which statement best describes ecosystems on Earth? A. Different environments support ecosystems with different
organisms.
B. Grasslands are the most diverse ecosystems on Earth.
C. Diverse ecosystems tend to be the least stable ecosystems.
D. Forest ecosystems tend to contain more large mammals than
producers

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

1. the is the thinnest part of the earth. 2. the is the thickest part of the earth. 3. what metals are mentioned in the text?

How do accessory pigments chlorophyll?