2024 NECO GCE BIOLOGY: 2024 NECO GCE BIOLOGY ANSWERS (4671)

(1ai)
(i)Warm-blooded.
(ii)Possess hair which is made of keratin.
(iii)Endothermic.
(iv)Four chambered heart.
(v)Mammary glands are used to produce milk to nourish their young.

(1aii)
During inhalation, the diaphragm is contracted which increases the volume of the lung cavity. During exhalation, the diaphragm is relaxed which decreases the volume of the lung cavity.

(1bi)
(i)This structure provides oxygen and nutrients to a growing baby.
(ii) It also removes waste products from the baby's blood.

(1bii)
(i)Kianji game reserve in Niger state.
(ii)Zamfara Forest Reserve In Sokoto state.
(iii)Yankari game reserve in Bauchi state.

(1biii)
Tabulate
(i)pollination pollens transfer from one flower to another. Whereas, in fertilization takes place after pollination is transferred successfully.

(ii) pollination Does not form while fertilization Forms to help the transfer of male gametes to the egg cell

(iii) pollination Occurs before fertilization while fertilization Occurs after pollination

(2ai)

The heart muscles contract, allowing de-oxygenated blood from the right ventricle to pass through the pulmonary valve into the pulmonary artery to the lung capillaries for exchange of oxygen and carbon dioxide. Oxygenated blood from the lungs then return by the pulmonary vein to the left auricle.

(2aii)

(i)the population can increase rapidly when the conditions are favourable

(ii)only one parent is needed

(iii)it is more time and energy efficient as you don't need a mate

(iv)it is faster than sexual reproduction.

(2bi)

(i)Drying

(ii)Canning

(iii)Heating

(iv)Freezing

(2bii)

(i)By seeking sun or shade or huddling together for warmth.

(ii)By shivering and non-shivering thermogenesis.

(iii)By vessels to the skin can alter an organism's exchange of heat with the environment.

(iv)By sweating and panting, in body temperature regulation.

(2biii)

(i)improve yield established varieties

(ii)improve resistance towards biotic and abiotic stresses faced by plant.