Which best describes the structure of a DNA molecule?

A. Two strands of amino acids linked together

B. Two strands of RNA linked together

c. A strand of DNA linked to a strand of RNA

D. Two strands of DNA linked together

The superior vena cava empties what

Where is the magnet that causes Earth's magnetic field located? What is this magnet made of?

Botulism differs from tetanus in that A. botulism causes flaccid paralysis and tetanus causes spastic paralysis. B. tetanus is a food-borne disease and botulism is airborne. C. botulism is due to an exotoxin and tetanus is due to an endotoxin. D.

All lipids share this characteristic. a. They are all made of fatty acids and glycerol. b. Lipids generally don't dissolve in water. c. Lipids are all acidic when mixed with water. d. In general, lipids have a low energy content.

Give three jobs for smooth ER

Describe how C. parvum obtains the glucose it needs for glycolysis after it has infected another cell

If earth didn't rotate what would be one major obstacle life would have to overcome

What are two key characteristics of cancer cells?

Why does the energy decrease as we go along the food chain from producers to tertiary consumers?

Whats a biotic factor scientists should control?