Some anaerobic protists obtain energy using
A. hydrogenosomes.
B. cytochromes.
C. mitochondria.
D. All of the choices are correct.
Answer: A
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Which of the following is (are) a sterilizing gas(es) that can be used on heat-sensitive materials?
A. Glutaraldehyde B. Ethylene oxide C. Chlorine gas D. Isopropanol
Why are invasive species, like the Brown tree snake in Guam, so successful in their new range? Select all that apply.
_____ They are able to adapt to any type of climate. _____ Their new food source has no form of defense against them. _____ In their new range, they have few or no natural predators to control their population growth. _____ They can mimic other toxic species. _____ They have no carrying capacity in their new range.
The single most important factor that determines the distribution of life in the oceanic province is ________.
Fill in the blank(s) with the appropriate word(s).
The double helix model of DNA suggested by Watson and Crick was exciting to the scientific community because:
a. it opened the door to new PCR based technologies. b. it explained how genetic material could be duplicated by means of the complementary strands. c. it suggested the role of DNA in protein synthesis. d. it proved once and for all that DNA was the messenger of heritable traits. e. All of the above are correct.