Which organism is NOT correctly matched to its energy source?
A) photoheterotroph - light
B) photoautotroph - CO2
C) chemoautotroph - Fe2+
D) chemoheterotroph - glucose
E) chemoautotroph-NH3
B
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An explanation for why an individual that is incapable of generating the fight or flight response would be abnormal function of this gland.
A. thyroid gland B. adrenal gland C. gonad D. heart E. pituitary gland
Bacteroids are
a. specialized nitrifying bacteria. b. small buds from ammonifying bacteria. c. specialized bacteria that help some plant roots absorb phosphorus. d. enlarged and immobilized nitrogen-fixing bacteria. e. interactions between plant root hairs and bacteria.
Which of the following is the greatest threat to
most species survival?
a. overharvesting b. pollution c. habitat loss d. oceanic desalinization e. none of these is a threat to species survival
The statement "Natural selection should favor pathogens that strike an optimal balance between the costs and benefits of harming their hosts" describes ________
A) the coincidental evolution hypothesis B) the shortsighted evolution hypothesis C) the trade-off hypothesis D) the energy-balance hypothesis