The "backbone", or sides, of the dna molecule are made of

a. cytosine.

b. nitrogenous bases.

c. hydrogen bonding.

d. sugar and phosphate.

What are two things arer cilia used for

In an Ecosystem Which Would Have a Larger Population, Producers or Primary Consumers? Explain.

True or False? An immune system that does not function properly could prevent an animal from maintaining homeostasis by allowing the animal to become sick.

Ecosystem number one contains many different species. Ecosystem number two contains only a few species. Which ecosystem will recover faster in the event of a natural disaster?

The cells of multicellular organisms are a. smaller than those of unicellular organisms. b. simpler than those of unicellular organisms. c. specialized to perform different tasks. d. not dependent on one another.

How long do footprints last at the sene of the crime?

Which of the following items would have the highest density? A. A 2 cm3 block of lead with a mass of 11 grams B. A 12 cm3 block of wood with a mass of 3 grams C. A 12 cm3 block of aluminum with a mass of 2 grams

Why are the nerves that take information from our world called sensory neurons?

Explain the effects of radiation on the cellular process of mitosis and meiosis

A biome that has a large amount of rainfall, high temperatures, and a poor soil is a