18Translocation of water in the xylem tissue involves the following except (a) root pressure (b)...

18Translocation of water in the xylem tissue involves the following except (a) root pressure (b) capillary action (c) transpiration pull (d) translocation
19.The following are major reasons why the butterfly lays eggs under the surface of a leaf, except to (a) shade the eggs from the direct rays of the sun (b) protect the eggs from predators (c) protect the eggs from being washed away by rain drops (d) camouflage the eggs
20.Which of the following statements reflects the mechanism of natural selection? (a) there are variations within every species (b) individuals of the same species are genetically identical (c) no organism in a species dies before sexual maturity (d) organisms with selective advantages are less likely to survive
21. A man suffering from obesity must avoid meals containing (a) margarine and butter (b) rice and beans (c) carrots & oranges (d) beef & fish
22. In evolution analogous structures are significant because they show (a) physiological diversity (b) functional diversity (c) genetic diversity (d) structural diversity
23.Which of the following substances is incorrectly linked to its enzyme? (a) protein - trypsin (b) fat - lipase (c) sucrose - pepsin (d) starch - amylase
24.The importance of courtship in animals include the following except(a) protection of territory (b) ensuring that the female chooses the right male species (c) arousing both male and female partners (d) to coincide with the ovulation period and ensure fertilization
25.The bacterium in mutualistic association with legumes converts (a) nitrates to ammonia (b) ammonium compounds to nitrites (c) nitrogen gas to ammonia (d) nitrites to nitrates
26. A herbivore cannot feed on a piece of meat because it has no (a) incisor to cut the meat (b) canines to tear up the meat (c) premolars to grind the meat (d) molars to mash the meat
27. In a particular habitat the role of an organism is referred to as its (a) level (b) biomass(c) niche (d) space
28.The distribution of organisms in a fresh water habitat like a stream or pond is determined by the following factors except (a) light penetration (b) ph of the soil (c) rainfall (d) temperature
29.The speed of wind is measured using the (a) wind vane (b) anemometer (c) photometer (d) barometer
30.Which of the following is a biotic component of an ecosystem? (a) soil (b) rainfall (c) light (d) fungi
31. In a family of 8 all the children are girls, which of the following reasons correctly explain this? (a) the woman cannot produce male children (b) the male has a low sperm count (c) the Y component of the males sex chromosome was always involved (d) the X component of the males chromosome was always involved
32.Which of the following the main problem facing xerophytic plants? (a) competition for sunlight (b) conservation of excess water (c) inadequate roots for water absorption (d) lack of adequate water
33.The following are green house gases except (a) carbondioxide (b) chlorofluorocarbon (c) methane (d) oxygen
34.Rural – urban migration in developing countries can be prevented by (a) increasing the number of years in school (b) putting up more factories in urban areas (c) having boarding schools in rural areas (d) even distribution of facilities in both regions
35. Muscles are attached to bones by means of (a) tendons (b) ligaments (c) cartilage (d) nerves
36.In a population food shortage may lead to (a) an increased survival rate (b) high reproduction rate (c) intra-specific competition (d) low rate of migration?

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Asked by Leo on 19th March, 2020