Is a virus alive?
A) Yes, it possesses all of the requirements for life.
B) Yes, it possesses enough of the requirements for life to be considered living.
C) No, it does not possess all of the requirements for life.
D) No, it does not possess any of the requirements for life.
C
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Marine organisms contain ____ % water by mass
a. 40-50 b. 50-60 c. 60-70 d. 70-80 e. 80-90
Select the statement that most accurately describes the action of antimicrobial drugs today.
A. The development of antiviral drug resistance has not been observed, as compared to the high rate of antibiotic resistance seen today. B. Effective antiviral drugs have a long history of development and use. C. Antiviral drug treatment is more effective than vaccination against a viral disease. D. Antiviral drugs often result in toxic side effects due to their inhibition of host cell activity.
A protist that lives inside a host organism and absorbs nutrients from that living host is
A) predatory. B) symbiotic. C) parasitic. D) a decomposer. E) photosynthetic.
Which gas began to increase in the atmosphere as a result of photosynthesis by autotrophic prokaryotes approximately 2.7 billion years ago?
A) methane B) carbon dioxide C) oxygen D) hydrogen