The vitamin necessary for fibrinogen and prothrombin formation (found in green vegetables and released by intestinal bacteria) is
A. vitamin E.
B. vitamin B.
C. vitamin K.
D. vitamin D.
E. vitamin A.
Answer: C
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Which of the following correctly lists the components necessary for prokaryotic and eukaryotic transcription?
A. RNA polymerase, general transcription factors, DNA, and RNA nucleotides B. RNA polymerase, general transcription factors, DNA and DNA nucleotides C. ribosomes, general transcription factors, DNA and DNA nucleotides D. ribosomes, general transcription factors, DNA and RNA nucleotides
Animals trapped and digested by "carnivorous" plants such as the cobra lily are used primarily as ____
a. an energy supplement during winter months b. a carbon source for the plant c. a nutrient supplement in nutrient-deficient environments d. food for bacteria and fungi that grow symbiotically with the plant roots e. an energy supplement for small plants growing in shady areas
Refer to the paragraph on the orangutan breeding program. Which of the following hormones would you use if you want to induce ovulation right away?
A) estradiol (estrogen) B) progesterone C) luteinizing hormone (LH) D) human chorionic gonadotropin (hCG)
Paleontological studies indicate that, over millions of years,
A. the extinction of species is not related to the community in which they lived. B. species that occurred together in the distant past still occur together today; the community has held constant. C. groups of species that have coevolved rise and go extinct together. D. species richness is constant over time. E. species seem to come and go individually as niches within a community become available.