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Author Topic: NECO 2022 BIOLOGY ANSWERS (ESSAY & OBJ)  (Read 211 times)

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Offline MANDINHO

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NECO 2022 BIOLOGY ANSWERS (ESSAY & OBJ)
« on: July 25, 2022, 04:32:03 pm »
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Offline MANDINHO

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Re: NECO 2022 BIOLOGY ANSWERS (ESSAY & OBJ)
« Reply #1 on: July 26, 2022, 12:57:09 am »
QUESTIONS AND ANSWERS ARE ALWAYS AVAILABLE A DAY BEFORE THE EXAM..... ALL SUBSCRIPTION SHOULD BE MADE ON TIME FOR IMMEDIATE ANSWERS DELIVERY

Offline MANDINHO

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Re: NECO 2022 BIOLOGY ANSWERS (ESSAY & OBJ)
« Reply #2 on: July 26, 2022, 10:44:11 am »
BIOLOGY OBJ
1-10: DDEDAAEACC
11-20: DEECCBBBAB
21-30: EEADEAEAEA
31-40: BCCBCCBADE
41-50: DCABCBECAC
51-60: EEBBCADBCE

COMPLETED

Offline MANDINHO

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Re: NECO 2022 BIOLOGY ANSWERS (ESSAY & OBJ)
« Reply #3 on: July 26, 2022, 11:03:59 am »
BIOLOGY ESSAY ANSWERS


INSTRUCTION: ANSWER THREE(3) QUESTIONS ONLY
===========================

(1ai)
(i) Mass Education:
Conservation edu≠cation and awareness have to be achieved both at the formal and non-formal level. Most people of an country are ignorant about the utility of wildlife.

(ii) Establishment of game or forest reserves:
A game reserve (also known as a wildlife preserve or a game park) is a large area of land where wild animals live safely or are hunted in a controlled way for sport. Indigenous wildlife in its natural habitat help in providing an environment where growth in numbers at a natural rate can occur.

(iii) Maintenance of Viable Species in Protected Areas:
A particular species of ani≠mal which is rare is given importance for con≠servation in a protected area.

(iv) Habitat management:
This indicates ecological study of habits and habitats of wildlife species, protection, preservation and improvement of habitats, census and statistical data regarding species to be conserved, etc.

(1aii)
Sexual reproduction is the type of reproduction which involves the fussion of the male gametes(sperm cell) and the female gametes(ova) to form a zygote which later develops to a young offspring

(1aiii)
I - Biceps brachii
II - Coracobrachialis

(1b)
Pain receptors in the skin of his foot receive the stimulus. The stimulus of pain is converted into a nerve impulse. The impulse travels along the sensory neuron towards the spinal cord along the dorsa root of the spinal nerve. In the spinal cord, the sensory neuron makes synaptic contact with the connector neuron and then the impulses are transmitted along the motor neuron along the ventral root of the spinal nerve to the effector organ/muscle which contracts to withdraw his foot. The reflex action provides a quick response to the stimulus so injury is minimised While this is happening, the sacculus and utriculus of the ear sent impulses concerning the position of his body and the cristae sent impulses relating to his speed and direction to the cerebellum. The cerebellum then sent appropriate impulses to the effector organs / muscles of his body to restore balance while on one foot.

(1ci)
(I) It enables plants to absorb water and mineral salts from the soil.
(II) It facilitates the movement of soil water.
(III) The evaporation of water due to transpiration from the plants cools the plants.

(1cii)
(i) Contour Farming
(ii) Applying Mulches
============================

(2ai)
Metamorphosis is defined as the series of gradual changes of forms and shape of an insect from the fertilized egg(immature stage) to adult(mature stage or adulthood).

(2aii)
(i) Muscle Growth; It promotes an increase is muscle mass and strength. Testosterone is also responsible for the mass, density and strength of bone.
(ii) Regulation of Sex Drive; Testosterone maintains male fertility, libido, mental and physical energy levels, muscle strength, general well being and prevents depression and fatigue.
(iii) Sperm Production; Testosterone regulates the sequence of spermatogenesis.Thi s is the process by which sperm is produced in the maleís body in the Testes.
(iv) Maturation; During puberty, an increase in testosterone levels in boys causes enlargement of the reproductive organs such as the **** and testes, increased libido, increased frequency of ****, and the growth of facial, chest, nipple and pubic hair.

(2aiii)
(i) Production of cholesterol and special proteins to help carry fats through the body
(ii) Regulation of blood levels of amino acids, which form the building blocks of proteins
(iii) Production of bile, which helps carry away waste and break down fats in the small intestine during digestion
(iv) Regulation of blood clotting

(2bi)
(i) Alkaloids
(ii) Gums
(iii) Resins

(2bii)
The ear contains vestibular fluid (which is involved in balance of the body), so when the body spins the fluid also does affecting the balance of the body then when spinning stops the body feels dizzy (until the fluid is at rest)
============================

(3ai)
(I) Cutaneous respiration
(II) Pulmonary respiration
(III) Buccal respiration

(3aii)
(I) In wind-pollinated flowers, the produced pollen grains are smaller and lighter in weight, which can be carried by the wind easily While In insect-pollinated flowers, the produced pollen grains are larger in size, sticky and spiny which helps the insect to carry the pollen grains.
(II) In wind-pollinated flowers, the Stigma is feathery or sticky and found hanging out of petals While in insect-pollinated flowers, the Stigma is small and is situated deep inside the petals.

(3aiii)
(I) Marginal placentation
(II) Axile placentation

(3bi)
The light rays coming from object enter through the eye, pass through the pupil of the eye and fall on the eye lens. The eye lens is a convex lens , so it produces real and inverted image of object.
The optical nerve conveys the image formed on retina to brain and we get sensation of vision.

(3bii)
(I) Saprophytic Nutrition
(II) Parasitic Nutrition
(III) Holozoic Nutrition
============================

(4ai)
DIAGRAM


(4aii)
(i) Internal Fertilization
(ii) External Fertilization

(4bi)
When a grain of pollen reaches the stigma, it creates a pollen tube for the sperm to journey down the style and fertilize the ovule; fertilized ovules become seeds. Fertilization is the death of the flower, as the petals drop or wither at this point and the ovary starts to enlarge and ripen into what we know as fruit.

(4bii)
(i) Plasma/fluid matrix
(ii) Erythrocytes/red blood cells
(iii) Platelets/thrombocytes
(iv) Leucocytes/white blood cells
============================

(5ai)
(i) They speed up reactions but remain unchanged during the whole reaction
(ii) They can function outside the body of the organism that produces them
(iii) Enzyme action is retarded by poison or inhibitors
(iv) They are affected by pH

(5aii)
Mendelís first laws of inheritance/law of segregation states that a pair of alleles/genes of contrasting character; segregates during gamete formation so that only one allele/gene enters a single gamete.       

(5aiii)


(5bi)
(i) Overuse of chemical fertilisers and pesticides on soil
(ii) Excessive tillage
(iii) Deforestation

(5bii)     
(i) Pairing
(ii) Seasonal migration
(iii) Territoriality                                   
===================================

COMPLETED

 

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