Correct Answer: C. 3:1

Correct Answer: B. ephemeral crops

Explanation

Four factors that cause food shortages in Nigeria are:

(a) Poor storage and preservation facilities: (i) Most agricultural products are perishable. (ii) Lots of farm products are lost because of lack of storage facilities. (iii) Most produce are wasted due to poor storage. (iv) Technical know-how on food storage is inadequate or lacking.

(b) Poor transportation network: (i) Presence of bad roads prevent evacuation of produce to market and this leads to wastage

(ii) The number of vehicles are inadequate. (iii) There is high cost of transportation. (iv) Most farms are not linked by roads and this eventually leads to wastage of produce.

(c) Lack of finance or credit facilities: (i) Peasant farmers have no access to credit facilities to expand their farm-land, (ii) High interest rate charged by banks prevents borrowing by farmers. (iii) Farmers do not have the required collateral security to enable them secure loan for expansion. (iv) Poor finance results in the purchase of inferior farm inputs which result in food shortage.

(d) Poor harvesting and processing techniques: (i) Premature harvesting results in food shortages. (ii) Late harvesting also results in food shortages. (iii) Bad method of harvesting also causes food shortages. (iv) Lack of modern methods of food processing also causes food shortages.

Correct Answer: A) Habitat Conservation

Correct Answer: B. rhizomes

Explanation

(a) (i)Percentage of unfertilized eggs

25 x 100

1500 1

= 1.67%

(ii)Percentage of fertilized eggs

No of fertilized eggs 1500 – 25

= 1475

Percentage of fertilized eggs

1475 x 100

1500 1

= 98.33%

(iii)Percentage of male chicks

475 x 100

1500 1

= 31.67%

(iv)Percentage of female chicks

No of female chicks = 1500 –25 – 475

= 1000 chicks

Percentage of female chicks

1000 x 100

1500 1

= 66.67%

(b)Signs that indicate the approach of parturition in a cow

- Widening of the cervix

- Loss of appetite

- Contraction of the uterine wall

- Restlessness

- Pains

- Enlargement of the mammary gland and secretion of milk

- Swelling of the vulva with discharge

- Frequent urination

- The animal isolates itself

(c )Vegetative materials that could be used in propagating ornamental plants

• - Leaves e.g. Bryophyllum
• - Stems e.g. stem cuttings, runners, suckers, rhizomes, tubers, corms,stolons, buds, bulbs, Roots e.g. slips

(d)Advantages of grafting

- Used to rapidly increase the number of desirable cultivars

- Used to change plant form

- Used to repair damaged plant parts

- Used to propagate plants whose cuttings are difficult to root

- It is used to provide disease resistance to a susceptible but desirable cultivar

- Virus indexing : A special technique used by plant pathologists to find out whether a plant is free from virus

- Propagate plants which cannot be propagated by seeds

- To shorten the period of fruiting

Correct Answer: D. Branding

Correct Answer: D. poor digestibility

Correct Answer: B) the price at which quantity demanded of a commodity equals quantity supplied

Correct Answer: A. single superphosphate