18. In replication of DNA, the helix is opened and what is unzipped?

A. Nitrogen bond

C. Oxygen bond

B. Hydrogen bond D. Phosphate bond

What term describes inorganic molecules that perform vital functions in the body?

How can hurricanes hurt coral reefs?

What do fungi and arthropods have in common? a. both groups are commonly coenocytic. b. the haploid state is dominant in both groups. c. both groups are predominantly saprobic in nutrition. d. the protective coats of both groups are made of chitin.

Farmers can reduce soil erosion by

Why might it be beneficial for a prokaryote to have the ability to regulate expression of particular genes, rather than just express all genes all the time?

What happens if you don't have enough carbohydrates?

Describe the movement of "air" into and out of the respiratory system. Be sure to include the following structures (larynx, trachea, bronchi, bronchioles, and alveoli) while being specific about whether it is mainly oxygen or carbon dioxide moving

How are diffusion and osmosis different? A. Osmosis is the movement of proteins. Diffusion is the movement of water. B. Osmosis is the movement of water. Diffusion is the movement of chemicals and molecules. C.

Water molecules exhibit a property which enables them to stick to each other. What is this property referred to as? Polarity Cohesion Adhesion

Using hooke's, F spring = K*E, law find the distance a spring with an elastic constant of 4 n/cm will stretch if a 2 newton force is appied to it. A. 4 cm B. 2 cm C. 1/2 cm D. 8 cm