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Арсланова Г.А. и др. Essential English for Biology Students.doc
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VIII. Answer the following questions. Use all information given before:

  1. Where do green plants thrive?

  2. How do C3 plants fix carbon dioxide?

  3. What are two major disadvantages of C3 plants in hot, dry environments?

  4. How do C4 plants fix carbon dioxide?

  5. What are the bundle sheath cells?

  6. What is the Hatch-Slack pathway?

  7. What are two main advantages of C4 plants in hot, dry environments?

  8. What are CAM plants?

  9. Why can CAM plants survive in very dry climates?

IX.Match the sentence halves. Make complete sentences:

1.

Green plants thrive in environments ranging from

A.

open their stomata (small pores in their leaves).

2.

C3 plants fix carbon dioxide directly

B.

the Hatch-Slack pathway.

3.

To obtain sufficient carbon dioxide, C3 plants must

C.

carbon dioxide is first fixed into a four-carbon intermediate before it enters the Calvin cycle.

4.

C4 plants have evolved a special metabolic adaptation

D.

into the Calvin cycle as the three-carbon compound glycerate 3-phosphate (GP).

5.

A ring of large closely packed cells called

E.

hot and dry equatorial regions to freezing-cold polar regions.

6.

The metabolic pathway that transports carbon dioxide into the bundle sheath cells is called t

F.

which reduces photorespiration.

7.

CAM is an abbreviation for crassulacean acid metabolism, a type of metabolism first observed in the family of plants called

G.

crassulaceae (which includes the stonecrops, fleshy-leaved plants that will grow on rocks and walls).

8.

CAM plants and C4 plants have a similar metabolism:

H.

the bundle sheath surrounds the leaf veins.

X. Read and translate the short text without any dictionary:

Fact of life:

Plants are not very efficient at harnessing energy from the sunlight they receive. Under the most carefully controlled laboratory conditions plants can reach 25% efficiency but on cloudy days the natural photosynthetic efficiency of most individual plants is about 0.1%. The annual winter evening primrose, Oenothera claviformis, has the highest natural photosynthetic efficiency at 8%, closely followed by sugar cane at 7%.

XI. Food for thought:

If C4 plants have a greater photosynthetic efficiency than C3 plants, suggest why all plants do not have C4 metabolism.

Biology Jokes

Enjoy funny biology jokes while taking a break from serious science.

  • What do you call the leader of a biology gang? - The nucleus

  • Blood flows down one leg and up the other.

  • The pistol of a flower is its last line of defense against insects.

  • Mushrooms look like umbrellas because they grow in damp places.

  • A couple of biologists had twins. One they called John and the other Control.

  • Genetics explain why you look like your father and if you don`t why

you should.

  • When you breathe, you inspire. When you do not breathe, you expire.

  • Three kinds of blood vessels are: arteries, vanes, and caterpillars.

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