During which phase of meiosis does crossing over chromosomes occur

What are the side effects of lactose intolerance

What happens to a ray of light that slows down when it hits a new medium at an angle? A. It dims. B. It brightens. C. It bends. D. It is absorbed.

In Drosophila, successful mating is frequently dependent upon an elaborate courtship "dance" performed by the male. Over 200 species of these fruit flies occur on the Hawaiian Islands.

If you stir salt into boiling water, what do you produce?

How do scientists examine the workings of the natural world?

What best describes where the sicentists who have contributed to our scientific knowledge were located A) they were mostly from Europe B) they where from all parts of the world C) they were mostly in the United states D) they were from Asian

All living organisms are composed of O A. only one cell. OB. at least three cells. OC. one or more cells. OD. at least 100 cells.

The membrane lining the interior of the abdominal cavity is called the 1 visceral pleura 2 visceral peritoneum 3 parietal pleura 4 parietal peritoneum

A mutation in a bacterial gene which codes for the enzyme which cross-links peptidoglycan with the result that the altered enzyme continues to cross-link the peptidoglycan but no longer recognizes penicillin. True/False

Which organelle packages and distributes proteins that are received from the endoplasmic reticulum? A. vacuole B. cytoplasm C. Golgi apparatus D. ribosome