E-PolyLearning

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

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

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

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

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