If an dna molecule is compared to a spiral staircase, what parts make up the steps.

A) pairs of nitrogen bases.

B) sugar and nitrogen base.

C) sugar and phosphate.

D) pairs of sugars.

Explain the relationship between societyand the technologies of using Earth'sresources.

How many different types of dogs are there in the world?

There are approximately 30,000,000 white-tailed deer in the United States, which covers 3,536,000 square miles. What is the population density, rounded to the nearest whole number, for the white-tailed deer?

The ancestors of elephants inhabited every continent expect Antarctic and Australia. But the Asian and African elephants are the only one to survive. Why?

Which of the following is an autosomal recessive disease? a) down syndrome b) diabetes c) polydactyly d) none of the above

the plant can either have a dominant allele or a recessive allele what would be a reason that is not a hardy weinberg equilibrium

What does DNA not contain?

Why are elements and compounds classified as pure substances?

What is independent assortment?

Sulfur trioxide is a covalent compound. Which is the chemical formula for sulfur trioxide? A. SO3 B. (SO) 3 C. S3O D. S3O3