Which one of the following is the least likely reason that bipedalism evolved in hominoids?
A. requires less energy than walking with all four legs
B. frees the hands for tool-making
C. frees the hands for carrying food to be shared with others
D. allows better surveillance for predators
E. increases access to food resources
B. frees the hands for tool-making
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In nature, bacteria
A. often grow in close association with many other kinds of organisms. B. may remain in a prolonged exponential phase. C. frequently synthesize structures such as slime layers. D. may adhere to surfaces by means of pili and slime layers. E. All of the choices are correct.
Four of the five answers listed below are produced by the same lobe of the pituitary. Select the
exception. a. antidiuretic hormone b. prolactin c. corticotropin d. somatotropin e. luteinizing hormone
What is the biological risk of using salt on icy roads in parts of the country that have a cold winter season?
a. Plant root cells will grow in excess to try to reach fresh water. b. Plant cells will take on excess water from the melted ice and become turgid. c. Salt is in limited supply in the ecosystem and this type of overuse will make it even more so. d. The salt has the risk of leeching into the ground and creating a hypertonic environment for plant cells.
The removal of the anterior pituitary gland would result in all of the following EXCEPT
A. production of the sex hormones. B. milk production. C. a decrease in the body's ability to lower blood calcium levels. D. a decrease in the ability to stimulate the adrenal cortex.