The enzyme responsible for unwinding the DNA double helix during replication is called DNA

A. Helicase

B. Polymerase

C. Amylase

Which organelle releases chemicals that break down large food particles into smaller ones?

Which is an important function of normal flora? a. aid with bone marrow production. b. crowd out pathogenic bacteria. c. destroy digestive track pathogens. d. manufacture iron in the bloodstream.

Tropical rain forests support more species per unit area than any other terrestrial ecosystem. what is one way rain forests are important to the health of the biosphere?