Are humans capable of upsetting global biogeochemical cycles with their activities?
A. No
B. Yes
Answer: B
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Which statement is not true about the rod cells? a. Detect dim light
b. Least abundant photoreceptor. c. Contain the pigment rhodopsin. d. Respond to changes in light intensity. e. Most abundant photoreceptor.
The dengue and Ebola viruses cause hemorrhagic fevers. Evaluate their threat levels as select agents using the criteria in the textbook, and decide whether they pose significant risk as biological weapons.
What will be an ideal response?
The phylum name Arthropoda refers to:
a. the ability to fly. b. a hard exoskeleton. c. jointed appendages. d. a segmented coelom. e. respiratory capabilities
Which of the following is/are true about natural selection?
A. On average, it favors the survival of individuals that have adaptive characteristics. B. It acts on genotypes rather than phenotypes. C. It always selects for more complex forms. D. It assures the survival of every fit individual. E. All of the choices are correct.