13. The specialized cells that facilitate gas exchange in plants are known as: a

Question

13. The specialized cells that facilitate gas exchange in plants are known as: a) grana. b) gas-exchange sites. c) bundle-sheaths. d) stomata. e) valves 14. Which of the following essential plant nutrients is NOT generally taken up through the roots? a) carbon b) phosphorous c) nitrogen d) potassium e) calciunm 15. Plants can grow just fine without soil if the essential nutrients are added to their water. This methods is called: a) hydrophobic b) hydrophilic c) hydroponic d) hydroperoxide e) hydrogenic 16. Carnivorous plants digest small invertebrate animals. These animals are broken down by the plant's enzymes, and the products are used to supplement the plant's supply of: a) oxygen. b) carbon dioxide. c) nitrogen. d) carbohydrates e) hydrogen. 17. Which of the following important crop plants is associated with nitrogen-fixing bacteria? a) cabbage b) wheat c) soybeans d) potatoes e) corn 18. Which of the following describes an alternative to sexual reproduction employed by most plants? a) parthenogenesis (growth from an unfertilized egg) b) producing putrid or disgusting odors c) spontaneous generation d) copulation ugh as through roe scker)

Explanation / Answer

13) stomata are the cells that faciliate gas exchange in plants.

14)  Carbon is not generally taken up through the roots.

16) The small invertebrate animals are digested by carnivore plant to fulfil their supply of nitrogen. So the correct option here is (c).

17) Soybeans are associated with nitogen fixing bacteria.

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