The antennae of insects have a function most similar to that of _____

A) rhinophores
B) dorsal plummules
C) cerata
D) chemoreceptors


Answer: A

Biology & Microbiology

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The outbreak of measles within the last few years was due to

A. mutation of the virus. B. change in the environment. C. a decline in vaccination of children in the previous years. D. increase in sensitivity of detection techniques.

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Polychlorinated biphenyls (PCBs) are toxic chemicals that were widely used in manufacturing until they were banned in the U.S. in 1977. PCBs are very persistent in the environment and bind strongly to sediments, meaning that bottom dwelling and filter feeding organisms are likely to take in PCBs as they feed. PCBs accumulate in the fatty tissues and, to a lesser extent, muscle tissues of organisms. Examine the food web below. Which species do you predict would have the highest concentration of PCBs in their tissues?

A. shrimp B. mussels C. seal D. heron E. salmon

Biology & Microbiology

The hormone in which levels remain high

when the body is suffering from inflammation and stress is

a. cortisol. b. somatotropin. c. thymosin. d. prolactin. e. parathyroid hormone

Biology & Microbiology

The correct operational sequence of the three processes listed below is:

a. glycolysis >> electron transport >> Krebs. b. electron transport >> glycolysis >> Krebs. c. Krebs >> glycolysis >> electron transport. d. electron transport >> Krebs >> glycolysis. e. glycolysis >> Krebs >> electron transport

Biology & Microbiology