Seedless vascular plants can ____ without water, but cannot ____ without water.
A. reproduce asexually; reproduce sexually
B. reproduce sexually; reproduce asexually
C. grow; reproduce
D. utilize phloem; utilize xylem
E. utilize xylem; utilize phloem
Answer: A. reproduce asexually; reproduce sexually
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The jawless vertebrates, referred to as agnathans, form a monophyletic group that includes an ancestor and all of its
descendants.
a. True b. False
Which of the following is the correct sequence of events for an altered protein that is secreted from the cell?
A. Golgi apparatus - ribosome - plasma membrane B. Golgi apparatus - smooth endoplasmic reticulum - plasma membrane C. nucleus - smooth endoplasmic reticulum - Golgi apparatus D. rough endoplasmic reticulum - Golgi apparatus - plasma membrane E. smooth endoplasmic reticulum - plasma membrane - Golgi apparatus - ribosome
Which one of the following statements is TRUE regarding the nitrogen cycle?
A) Nitrogen fixation results in the production of nitrogen from carbon. B) Atmospheric nitrogen is unavailable to living organisms because two nitrogen atoms are held tightly together by a triple covalent bond. C) Plants take up ammonia directly from the atmosphere. D) Once nitrogen is "fixed," it must then be converted to nitrogen gas before living organisms can use it. E) In a balanced ecosystem, nitrogen fixation occurs more often than denitrification.
The difference in the fundamental niche and the realized niche is
A. the realized niche is theoretical while the fundamental niche is the entire niche that an organism can use. B. the fundamental niche is the actual niche that a species occupies while the realized niche is the potential area that the species is capable of inhabiting. C. the fundamental niche is the entire niche that a species is capable of using while the realized niche is just what is being occupied. D. the fundamental niche is smaller than the realized niche.