Nucleotides are found in
a. proteins.
b. steroids.
c. lipids.
d. ATP, DNA, andRNA.
e. carbohydrates.
Answer: d
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Many farmers and ranchers consider prairie dogs to be pests and have active programs to eliminate them. Is this viewpoint commensurate with good ecosystem management?
a. Yes, because it protects cultivated food crops. b. Yes, because it increases biodiversity. c. No, because it decreases biodiversity, although it may protect cultivated food crops. d. It has no effect on biodiversity.
Explain how the leaf is adapted for capturing energy from sunlight and for acquiring carbon dioxide and water
What will be an ideal response?
Circulatory systems
a. are found in all animals. b. result in slow distribution of nutrients and gases. c. include one or more hearts. d. are always closed systems. e. are all of these
The water absorption rate of a plant's roots is greatly increased by
A. presence of many stomata only. B. presence of root hairs only. C. both association with mycorrhizal fungi and presence of root hairs. D. association with mycorrhizal fungi only. E. both presence of many stomata and root hairs.