If a DNA molecule is compared to a spiral staircase, what parts make up the steps?

sugar and nitrogen base

pairs of nitrogen bases

sugar and phosphate

pairs of sugars

Whole blood with the formed elements and clotting proteins removed is called? A. plasmaB. axenicC. lymphD. serumE. CSF

The tube leading from the bladder to the outside of the body is the:

Which of the following is true regarding extinction? A. If the rate of speciation in a clade is equal to or less than the rate of extinction, the clade will survive. B.

Which is a cell that contains genetic information from both the mother and the father? A. fertilization B. gamete C. ova D. zygote

Which part of a cell is like a food processing plant?

Hybrids between grizzly and polar bears have been moving farther north. What do you predict about the migration of their hybrid zone over time? A. It will eventually completely overlap with the range of polar bears. B.

What is the importance of the genetic code?

How many DNA helices are there in a bivalent? A) 1 B) 4 C) 8 D) Some other amount.

What is nondisjunction

Weeds are a specific variety of plants that strip nutrients from the soil. True or False