All the populations of a particular kind of organism are members of the same:
A. ecosystem
B. species
C. habitat
D. community
Answer: B
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The use of arsenic compound Salvarsan as a treatment for syphilis is credited to
A. Ehrlich. B. Waksman. C. Chain. D. Fleming.
Individuals with one sickle cell allele and one normal hemoglobin allele are not affected by the malaria parasite
because of ____.
a. neutral mutations b. heterozygote advantage c. frequency-dependent selection d. disruptive selection e. stabilizing selection
Which of the following correctly represents length of axons found in humans?
a. 0.1 to 1 mm b. 1 to 10 mm c. 1 mm to 10 cm d. 1 mm to 1 m e. over 1 m
An atom is best characterized as ________ .
a. a structural unit of interacting tissues b. an organized array of cells that interact in a collective task c. a fundamental unit of all substances, living or not d. the smallest unit of life e. a biological complex made up of smaller units called molecules