A boxer has been jumping rope for an hour. His leg muscles are burning, and he feels weak. Which substance is the most likely cause of the burning he feels in his muscles?

Which of the following is an example of a chemical change? A. Dissolving salt B. Frying an egg C. Freezing water D. Bending metal

What is in an ecosystem that is not in a community?

If color is an inherited trait in beetles, and birds are more likely to eat brown beetles than green beetles, a. the frequency of the green allele will increase. b. the frequencies of the brown and green alleles will not change. c.

Altering protein structure a. can alter its function. b. can be caused by heating the protein. c. can have serious medical consequences. d. all of the answers are true.

What is the general composition of lymph? a. a viscous, red fluid that contains vitamins and minerals b. a light-red fluid that stores fat-soluble vitamins c. a transparent yellowish fluid that contains no red blood cells or platelets d.

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.

Write a sentence that explains how each pair of terms are related. 1. cystic fibrosis - mutation 2. biopsy - metastasis 3. carcinogen - melanoma 4. multifactorial disorder - heart disease 5. MRI scan - CAT scan

What's the biggest change to San Joaquin Valley ecosystems caused by humans in the past 150 years?

What Is the Myocardium?

How does the dna repair enzyme photolyase prevent skin cancer?