2020/2021 WAEC/NECO Answers: NECO 2021 - Animal Husbandry ANSWERS



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(1a)
In a tabular form

Under MALE
(i) Presence of penis.
(ii) Presence of testes.
(iii) Presence of vas defences.

Under FEMALE
(i) Absence of penis.
(ii) Presence of ovaries.
(iii) Absence of vas defenses

(1b)
In a tabular form

Under BIRD
(i) Presence of beak.
(ii) Presence of wings.
(iii) Absence of four walking legs.
(iv) Absence of teeth.
(v) Absence of furs

Under MAMMALS
(i) Absence of beak
(ii) Absence of wings.
(iii) Presence of four walking legs.
(iv) Presence of teeth
(v) Presence of furs.

(1c)
Rabbit --> kindling
Goat --> kindling
Pig --> farrowing
Cattle --> calving

=======================================================

(2a)
(i) Low capital is investment
(ii) very little care and feeding is required
(iii) Low labour required
(iv) Low levels of management

(2b)
(i) cheese
(ii) whey
(iii) yoghurt

(2c)
(i)skin
(ii)bone
(iii)meat

=====================================================

(4a)
(i)hybridization
(ii)inbreeding
(iiicross breeding

(4b)
(i) it control disease
(ii) it decrease the chance of injury
(iii) prevent stallion over use
(iv)allows more mares to be breed
(v)semen is evaluated each time it is collected.

(4c)
Tabulate
Under Inbreeding;
(i)it involve the mating of related individuals that have one or more relatives in common
(ii)Linebreeding is a form of inbreeding.

Under Linebreeding
(i)it involves arranging matings so that one or more relatives occur more than once in a pedigree
(ii)Linebreeding is a term commonly used to describe milder forms of inbreeding

=================================================

(5a)
(i)Environment factor
(ii)Nutrition
(iii) Health status of the animal
(iv)Breeds of animal

(5b)
(i) Incubation period
(ii) Prodromal period
(iii) Period of decline

(5c)
(i) It Causes Anaermia
(ii) It cause liver rottening
(iii) It leads to digestive disturbance and bleeding internally.

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FISHERIES ANSWERS
*FISHERIES ANSWERS*


(3ai)
Carnivores: These are animals that feeds on animals only. They derive their energy and nutrient requirements from a diet consisting mainly or exclusively of animal tissue, whether through predation or scavenging.

(3aii)
Herbivores: These are animals that feeds on plants only. They get their energy from eating plants, and only plants. Many herbivores have special digestive systems that let them digest all kinds of plants, including grasses.

(3aiii) Grazers: Grazers are animals, usually a herbivorous mammal, which eats grasses or other multicellular organisms such as algae.

(3b)
(Choose any FOUR)
(i) Carbohydrate
(ii) Protein
(iii) Fats and oil
(iv) Mineral salt
(v) Vitamin

(3ci)
L = 30,000cm
b = 10,000cm
Area of the pond = 30,000×10,000/100×100
=30000m²

(3cii)
(i) Resistance to diseases
(ii) Fast growth
(iii) Accept supplementary feed
(iv) Low cost of production
(v) Easy to breed in captivity

(3ciii)
Mariculture is a specialized branch of aquaculture involving the cultivation of marine organisms for food and other products in the open ocean, an enclosed section of the ocean, or in tanks, ponds or raceways which are filled with seawater.




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