In the 1968 book The Population Bomb, biologist Dr. Paul R. Ehrlich wrote, “The battle to feed all of humanity is over. In the 1970s hundreds of millions of people will starve to death in spite of any crash programs embarked upon now. At this late date nothing can prevent a substantial increase in the world death rate.” Yet this dire prediction did not come true. In which of the following ways did humans push back against this looming crisis?
a. Some forms of birth control were made illegal or difficult to maintain.
b. Extensive measures have been instituted to save or extend life through medicine.
c. Some countries instituted efforts to control population growth.
d. Countries with depressed growth rates made efforts to increase their population growth.
c. Some countries instituted efforts to control population growth.
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Which of the following is NOT an oxygenic phototrophic microorganism present in marine waters?
A) Ostreococcus B) Prochlorococcus C) Roseobacter D) Trichodesmium
In phage ?, the relative affinities of the lambda repressor and the cro protein to the three binding sites in the OR region are:
A. the same. B. inversely proportional C. unrelated.
In carbohydrates, the ratio of hydrogen (H) to oxygen (O) is ________.
A) 1:1 B) 2:1 C) 3:1 D) 4:1
____ are not considered microorganisms.
A. Yeast cells B. Bacteria C. Protozoa D. Insects