36. | Chemical energy is supplied to eukaryotic cells by |
a. | chloroplasts and golgi complexes |
b. | mitochondria and ribosomes |
c. | mitochondria only |
d. | mitochondria and chloroplasts |
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Answer: (d).mitochondria and chloroplasts
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37. | Which part of a plant contains the male sex cell? |
a. | Ova |
b. | Style |
c. | Stamen |
d. | Pollen |
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Answer: (d).Pollen
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38. | A widely accepted explanation for transport of sugar in phloem is called |
a. | root pressure theory |
b. | transpiration |
c. | pressure flow hypothesis |
d. | cytoplasmic streaming |
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Answer: (c).pressure flow hypothesis
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39. | Phloem is composed of |
a. | vessel elements and companion cells |
b. | tracheids and vessel elements |
c. | sieve-tube elements and companion cells |
d. | tracheids and sieve-tube elements |
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Answer: (c).sieve-tube elements and companion cells
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40. | The movement of most minerals, including potassium into root cells is by |
a. | osmosis |
b. | diffusion |
c. | bulk flow |
d. | active transport |
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Answer: (d).active transport
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