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(a) (b) Effects of the Following Factors on the Conservation of Natural Resources: (i) Poor economy of a nation: It leads to lack of funding in creating awareness /educating people on the importance of conservation. It leads to increase in poaching/forest encroachment/over fishing/illegal mining by locals,-Jt leads to inability to execute/enforce policies/strategies; It leads to poor implementation/enforcement of laws-It leads to inability to setup forest/game reserves: -It leads to inability to employ guards-lt affects the feeding of animal species in game reserves: -It affects the habitat of species;-t affects the maintenance/acquisition of enough land for game reserves. (ii) Poaching:-Leads to the death of endangered species, -Leads to recduced population/extinction of species; -It affects tourism/economy of a nation; -lt disrupts the natural food chain: -Leads to spread of disease from wildlife animals to humans. (c) Roles Played by the Government in Conservation of Natural Resources: -Enactment/enforcement of laws for conservation:-Formulating policies against poaching/overgrazing/over fishing/for tree planting campaign/protecting soil from erosion. -Creating ranches to aviod overgrazing; -Training officials to guard game reserves/fish ponds; -Educating the general public on conservation of resources;-Setting up surveillance equipment for security officers in game reserves,-Setting up forest/game reserves/ Fish ponds; -Encouraging regeneration of endangered species.

No expanded working has been attached for this question yet. The verified answer is Option A.

No expanded working has been attached for this question yet. The verified answer is Option B.

No expanded working has been attached for this question yet. The verified answer is Option D.

No expanded working has been attached for this question yet. The verified answer is Option A.

(a) (b)(i) Irritability: This is the response/sensitivity to changes; to stimulus/stimuli; in the environment (ii) (c) Examples of Animals that Exhibit: (i) Territoriality: -Male fish/Tilapia, -Male Agama lizard/crocodile/lizard: -Birds;-Man, Dogs/ Monkeys/ Hippopotamus/apes/wolves/antelopes/baboons/lions.(ii) Seasonal migration: -Catfish/mudfish; -Swallow; -Wildebeest; -White egret; -White stock bird; -Salmon: -Desert locust;-Quelea;-Eel. (iii) Display: -Peacock; -Domestic fowl; -Pigeon;-Dove, -Penguins.

(a)(i) A: Neck region/neck B: Chest region/thoracic region/thorax C: Upper abdominal region/upper abdomen (ii)A: Supports the head/head region - protects blood vessels - protects spinal cord - passage for blood vessel - passage fpr spinal cord - provides surface for attachment of neck muscles. B: Provides point of attachment for chest muscles /articulates with rib bones - protects the/passage of spinal cord. C: Bears weight of the body - permits bending/sideways movement/rotation of the body - provides surface for attachment of muscles -protects the spinal cord/passage of spinal cord. (b)(i) (ii) Neural spine: for attachment of (abdominal and back ) muscles Transverse process: For muscle attachment Neural arch: For muscle attachment/protection of spinal cord Centrum: Provides (mechanical) support Neural canal: Encloses/Houses the spinal cord/passage for spinal cord. (C)(i) A: Cervical vertebra (7) B: Thoracic vertebra (12) C: Lumbar vertebra (5) (ii) Sacral/sacrum - caudal/coccyx

(a) (b)(i) E: Viable seed F: Oxygen/viable seed G: Moisture/water (ii) All the conditions of water, oxygen/air, warmth/suitable temperature, viable seed necessary for germination were present; - it is the control experiment. (c)

(a) Classification: (i) Phylum L: Arthropoda M: Arthropoda (ii) Class: L:insecta: M: insecta, (b)i) Observable Features of Members of the Class of Specimen L:-Three body divisions: head, thorax, abdomen;-Three pairs of jointed walking legs;-Presence of wings;-A pair of jointed antennae -Spiracles present;- A pair of compound eyes; -Exoskeleton of chitin/chitinous exoskeleton. (ii) Other classes of phylum of specimen L:-Crustacea-Chilopoda-Diplopoda-Arachnida. (c) Economic Importance of Specimen: (i) L: -Vector/transmits diseases; -Buzzing noise disturbs(sleep)-Causes discomfort through its bites. M: -Has aesthetic value/used as ornament, Pollinates flowers: -Destroys(citrus) fruits by feeding on them; (ii) Ways by which Specimen L/Mosquito can be Controlled -Sleeping under nets ( to prevent adult mosquito bites); Clearing the bushes around the house ( to eliminate places where mosquitoes hide and breed); -Removing all stagnant water bodies around the house ( to prevent mosquitoes from breeding); -Using/spraying insecticides in the rooms/around the house (to kill adult mosquitos) -Pouring oil on stagnant water bodies (to suffocate the larvae),-Introducing fish/bacteria, e.g. Bacillus species into water bodies (to eat up mosquito larvae and pupae); -Using mosquito repellents(to prevent adult mosquitos from biting); -Using light to attract and kill adult mosquitoes/use of mosquito trap: -Using genetically modified mosquitoes to result in early death of larvae/eggs that do not hatch. (d)(i) Observable differences between specimens L and M (ii)Similarities between specimens L and M: Both have -three body divisions/head, thorax and abdomen-proboscis; -wings: Six legs/three pairs of legs:- one pair of compound eyes; - one pair of antennae - Exoskeleton of chitin chitinous exoskeleton; - Segmented abdomens - three thoracic segments. (c) Habitat of specimens L and M: L: Houses/land/swamp/marshy areas/ dark places/tall grasses/ pond(s) M: Garden/on trees/leaves/flowers/rock surfaces/bare ground/grassland

2x = 3x - 50 alternate angle 50\(^o\) = 3x - 2x 50\(^o\) = x < NPQ = (3x - 50)\(^o\) = 3(50)\(^o\) - 50 = 150 - 50 = 100\(^o\)

< O\(Q\)P = 48\(^o\) (base angles of isoceles \(\triangle\)) m = 48\(^o\) + 48\(^o\) = 96\(^o\) (exterior angle of a \(\triangle\))

x + y + m + z = 180º but m = \(\frac{1}{2}\)(x + y + z) 2m = ( x + y + z ) Thus ( x + y + z) + m = 180º (2m) + m = 180º 3m = 180º m = \(\frac{180º}{3}\) = 60º

m + n + 90\(^o\) + 180\(^o\) (sum of angle in a \(\triangle\)) m + n = 180\(^o\) - 90\(^o\) m + n =90\(^o\)

Evaluate (212)\(_3\) - (121)\(_3\) + (222)\(_3\) (212)\(_3\) + (222)\(_3\) = 1211\(_3\) → 1211\(_3\) - 121\(_3\) = 1020\(_3\)

75.0785 -35.624 -------------- 40.4545 +9.83 ------------- 50.28 to 2d.p