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

a. cytosine.

b. nitrogenous bases.

c. hydrogen bonding.

d. sugar and phosphate.

What is the ABO blood classification based on? a. antibody on the red blood cell b. antigen in the blood c. antigen on the red blood cell d. hemoglobin in the blood Sickle cell anemia is a condition where the red blood cells are deformed.

If global warming continues, global average temperature could rise by 4ºC by the end of the century. Which of the following effects is not expected to occur?

The rate of growth of a certain cell culture is proportional to its size. In 10 hours a population of 1 million cells grew to 99 million. How large will the cell culture be after 25 hours

If decomposers were added to an energy pyramid that contains producers, primary consumers, and secondary consumers, which trophic level or levels would be affected?

Why will the molecules move from right to left through the cell membrane?

What is tolerance (explanation)

Which actions should a nurse take while caring for a preschooler whose blood lead level is found to be 25 mcg/dl? select all that apply?

Sodium benzoate is a bitter chemical often used in tiny amounts as a food preservative. The ability of humans to taste sodium benzoate is caused by a dominant allele, t. The recessive allele ("non-taster") is n.

Which of the following correctly displays the sequence of developmental milestones? A) blastula → gastrula → cleavageB) cleavage → gastrula → blastulaC) cleavage → blastula → gastrulaD) gastrula → blastula → cleavage

What is true about DNA