A researcher suspects that the food in an ecosystem has been contaminated with radioactive phosphates over a period of months. Which of the following substances could be examined for radioactive phosphate to test the hypothesis?

A) the amino acids within proteins produced by organisms living in the area
B) the starch produced by plants in the area
C) the DNA of the organisms in the area
D) All of the above are true.


C

Biology & Microbiology

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Coprophagy is important for the nutritional balance of _____

A) ruminants such as cows B) insects and arthropods C) rabbits and their relatives D) squirrels and some rodents E) very large animals, such as elephants

Biology & Microbiology

Some tissues need to be able to expand and contract, such as lungs during breathing and intestines during digestion. Predict which ECM protein would be abundant in these tissues.

A. Elastin B. Laminin C. Fibronectin D. Glycosaminoglycans E. Collagen

Biology & Microbiology

Integration of body functions is controlled by the

a. respiratory system. b. nervous system. c. endocrine system. d. defense system. e. nervous system and the endocrine system.

Biology & Microbiology

The tradewinds in the zone from 0 to 30 degrees north latitude are generally from the ____.

A. north B. northwest C. northeast D. southeast E. southwest

Biology & Microbiology