Why do you need more oxygen when you exercise scholar?

Describe what happens when an egg is fertilized in a female

The Great Lakes in North American hold about what percent of Earth's fresh surface water? 5% 10% 15% 20%

If a red blood cell is placed in distilled water, which would have a higher concentration of water molecules, the distilled water or the red blood cell? where would water potential be less? is distilled water a hypotonic or hypertonic solution?

If a dna molecule is made up of 30% thymine what percent of it would be guanine

A pair of wild type fruit flies of unknown origin are mated and produce wild type F1 offspring. The F1s are allowed to interbreed and produce an all wild type F2.

Which of the following occurs in the trp operon? A. The operon is usually off. B. The operon is usually on. C. The active repressor binds to the operator to stop transcription. D.

How does crossing over during meiosis lead to genetic variation?

Sympathetic nervous system vs parasympathetic nervous system

Some viruses found on the oceans surface can infect and kill plankton. How would this affect the fish population and human health?

A papaya has many seeds. each papaya seed can grow into a new tree. however that does not happen. why?