Which term broadly describes any kind of interaction between two or more animals?
A) competition
B) dominance hierarchy
C) foraging behavior
D) social behavior
Answer: D
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Imagine you conduct a parabiosis experiment with two strains of mice, one of which lacks a functional leptin gene (ob strain) while the other lacks a functional receptor for this hormone (db strain). Which of the following outcomes would you observe?
A. no weight change in the ob mouse B. no weight change in the db mouse C. increased body weight in the ob mouse D. decreased body weight in the ob mouse E. decreased body weight in the db mouse
Gene flow is accomplished by ________
A) migration B) sexual recombination C) mutation D) natural selection
Antidiuretic hormone (ADH)
A. is secreted by the anterior pituitary gland. B. increases the permeability of the distal convoluted tubules and collecting ducts to water. C. causes the production of a larger quantity of urine. D. causes a less concentrated urine to be produced. E. directly decreases blood volume.
Which of the following organisms have a cell wall composed of silicon?
a) cyanobacteria b) diatoms c) archaebacteria d) euglena e) dinoflagellates