WAEC 2020 - AGRIC ANSWER

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ANSWERS:


(1a)
SPECIMEN A:
(i) It is used for weeding
(ii) It is used in harvesting root crops

SPECIMEN B:
(i) It is used for removal of roots of trees
(ii) It is used for tilling of hard soils

(1b)
(i) Cocoa
(ii) Rubber
(iii) Orange
(iv) Kolanut


(1c)
(i) Emasculator
(ii) Rubber rings
(iii) Surgical scapel

(1d)
(i) Sharpen blunt blades
(ii) Keep in dry and cool places
(iii) Clean or wash after use
(iv) Oil the metal blade before storage

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(2a)
The aim of the experimental set up is to separate the specimen F(sandy loam) into fractions of different layers by sedimentation method

(2b)
(i) Soil sample
(ii) Hydrogen peroxide
(iii) Measuring cylinder


(2c)
(i) Collect some sample of specimen F (sandy loam) from the school garden
(iii) Fill up to about 250cm³ measuring cylinder and add 200cm³ of water to the soil in the measuring cylinder
(iv) Add small quantity of hydrogen peroxide to the content of the measuring cylinder. This help to break up soil lumps

(2d)
(i) Sandy soil
(ii) Loamy soil
(iii) Organic particles
(iv) Water

(2e)
[Click here for the Image]

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(3ai)
Hydrocyanic acid

(3aii)
(i) Boiling
(ii) Sundrying
(iii) Soaking
(iv) Roasting in a metal dish over a wood fire

(3b)
Specimen I:
(i) It is an antioxidant, hence useful for medicinal purposes
(ii) Source of vitamin A

Specimen J:
(i) Serves as spice for food
(ii)


(3c)
(i) Maggots
(ii) Thirps
(iii) Bulb eelworm
(iv) Bulb mites

(3d)
(i) Spices
(ii) Vegetable

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(4a)
(i) They do not feed on each other
(ii) They have the same growth
(iii) They feed on similar foods and have the same living habitat

(4b)
(i) Cast net
(ii) Gill net
(iii) Hook and line
(iv) Fish trap

(4c)
(i) Cheese
(ii) Ice-cream
(iii) Yogurt
(iv) Butter

(4d)
(i) It seal pores
(ii) It present water loss
(iii) It encourage the growth f plantation
(iv) It reduce acidify of pond

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ANSWER LOADING......
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