How, why, and when are chromosomes formed within a nucleus?

Both bacteria and viruses A. have ribosomes. B. have cell walls. C. can cause disease. D. all of these

What is thought to be most responsible for the salinity of the oceans

Students are studying the rate of yeast fermentation under different conditions. Glucose is a monosaccharide. Sucrose is a disaccharide.

Which germ layer develops into bones, kidneys, bladder, ovaries or testes, blood, and muscles, including the heart? A. Mesoderm B. Ectoderm C. Blastula layer D. Endoderm

If an average person produces 2 million red blood cells per second, how many red blood cells will be produced in a 24 hours period

Which is better 1 big cell or 4 small cells

Describe how scientists can directly measure the movement of tectonic plates

Which of the following is false? A. the graduation rate in a city and the rate of unemployment in a city is a positive correlation B. the cost to mail an envelope and the weight of the envelope is a positive correlation C.

Which material is being cycled? carbon dioxide nitrogen oxygen water

Predict how an unusually prolonged drought might affect a biological community