By preserving hot spots, ecologists hope to protect species in danger of extinction due to
a. captive breeding programs.
b. expanding national parks.
c. human activity.
d. biological magnification.

The health, management and conservation of biodiversity, is a challenge facing ecosystems worldwide. the major factors that affect the health and function of the great barrier reef are climate change and pollution. which question investigates the effects of a biotic factor on the reef ecosystem?

Which codon is the code for the amino acid histidine (his)?

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air