What parts of a nucleotide make up the back bone of a nucleic acid?

What is the purpose of histones?

In a certain population, 99% of the people have Rh-positive blood. Suppose that two people from this population marry. What is the probability that they are both Rh-negative, thus making it inevitable that their children will be Rh-negative?

Which of the following genetic changes would be passed from parent to child? A. A translocation in a nonhomologous pair of chromosomes in a liver cell B. A mutation in a skin cell caused by UV light C. The addition of a chromosome in an egg cell D.

While flipping through the channels, you stop on a television program about primate evolution. the host says that there is a six-million-year gap in the fossil evidence between the latest oligocene catarrhines and the earliest miocene proconsulids,

The most widespread negative health impact of air pollution is the

13. Excess salt is removed from the body through sweat glands in the skin, This is an interaction between systems.

a cell with 5% salt concentration is placed in a beaker with 1% salt concentration. what will happen to the cell over time

What are the roles of the nervous muscular circulatory and respiratory systems in heat regulation?

Which cell structures are seen in all cell types? Check all that apply. - DNA - cytoplasm - nucleus - ribosomes - cell membrane

The small blood vessels that deliver blood to and pick blood up from tissues are