Pp. 135-136. Quick check

1. Two from wheat, soya beans, and rice.

2. Sugar cane is called a C 4 plant because it fixes carbon dioxide as a four-carbon compound.

3. At night.

4. a C4; b CAM; c C3

p. 136. Ex. II: adapt – adaptation – adaptable

fix – fixation – fixed

conserve – conservation - conservative

separate – separation – separate

dry – drought - dry

pp. 136-137. Ex. IV: 1N; 2F; 3L; 4A; 5J; 6M; 7B; 8O; 9C;

10G; 11D; 12H; 13I; 14K;15E.

p. 138. Ex.VII: 1) 1-3; 2-4; 5-6; 2) 1-2; 3-6; 4-5;

3) 1-4; 2-3; 4) 1-4; 2-3.

pp. 138-139. Ex. IX: 1E; 2D; 3A; 4F; 5H; 6B; 7G; 8B.

Unit VIII. Text 8.1

P. 143. Quick check

1. a) cuticle; b) the upper surface is more exposed to sunlight, making it hotter than the lower surface.

2. Photosynthesis.

3. Collenchyma consists of living cells with the corners of each cell reinforced by extra cellulose whereas mature sclerenchyma consists of dead cells impregnated with a thick layer of lignin.

p. 144. Ex. III: connect – connection – connective

require – requirement - required

support – support – supportive

protect – protection – protective

adapt – adaptation/adaptability – adaptable

expose – exposition – exposed

reproduce – reproduction – reproductive

p. 144. Ex. IV: 1) 1-4; 2-5; 4-6; 2) 1-4; 2-6; 3-5; 3) 1-3; 2-4; 4) 1-4; 2-3.

p. 145. Ex. VI: 1D; 3G; 3E; 4F; 5B; 6A; 7C.

pp. 145-146. Ex. VIII: 1B; 2F; 3G; 4C; 5E; 6H; 7D; 8I; 9A; 10J.

Text 8.2

P.150. Quick check

1. All stems have nodes and internodes.

2. Support, transport, tissue production, storage of food and water.

3. Parenchyma cells help support stems by becoming fully turgid and pressing against other cells.

p. 150. Ex. II: diperse – dispersal - dispersed

attach – attachment – attached

locate – location – located

identify – identification - identified

store – storage - stored

maintain – maintenance - maintained

penetrate – penetration - penetrated

strengthen – strength - strong

grow – growth - grown

add – addition – additional

p. 151. Ex. VI: 1) 1-4; 2-5; 3-6; 2) 1-3; 2-4; 3) 1-6; 2-4; 3-5;

4) 1-3; 2-4; 5) 1-3; 2-4; 5-6.

p. 152. Ex. VIII: 1E; 2A; 3G; 4H; 5F; 6D; 7C; 8I; 9B.

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