The factor that least affects food shortages in sub-saharan Africa is?
A. flooding B. pests C. mixed-cropping D. drought Correct Answer: Option C – mixed-cropping
Carbon (IV) oxide content of the atmosphere is least affected by?
A. cutting down and clearing of forests B. forest fires C. burning of fossil fuels D. plant and animal respiration Correct Answer: Option A – cutting down and clearing of forests
What is the percentage of occurrence of Imperata spp?
The number of plants species obtained from a population study of a garden is as follows: Guinea grass (15), Ipomea spp (5), Sida spp (7) and Imperata spp (23). What is the percentage of occurrence of Imperata spp? A. 35% B. 16% C. 46% D. 23% Correct Answer: Option C...
Salts and water are absorbed in the roots and transported to leaves by?
A. diffusion through the xylem tissues B. osmosis through the phloem tissues C. diffusion through the phloem tissues D. osmosis through the xylem tissues Correct Answer: Option D – osmosis through the xylem tissues
When specimen X is mixed with few drops of iodine solution, the appearance of a blue-black colour confirms that X is?
A. galactose B. starch C. sucrose D. glucose Correct Answer: Option B – starchProducts
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