NECO Biology Answers 2023 for Obj-Essay Questions Out

2023 NECO Biology Answers Release – See Objective & Essay Questions Here.

The Neco biology answers 2022 for objective essay questions is put. The National Examination Council (NECO) Biology SSCE will be written on Tuesday 26th July 2022.

The Neco Biology exam will comprise of Papers III & II: Objective & Essay which will commence from 10•00 am to 12•30 pm.

We are posting out NECO Biology questions for candidates that will participate in the examination for practice purposes from Neco biology answers and past questions.

NECO Biology Answers 2022 SSCE.

PAPER-II [Essay]
Answer any FOUR questions.
Write your answers on the answer booklet provided.

1. (a) i. What is respiration?
ii. In a tabular form, state four differences between gaseous exchange and aerobic respiration.
(b) i. Explain the term residual air.
ii. What is the importance of residual air to mammals?
(c) State four characteristic features associated with respiratory structures.
(d) i. What is oxygen debt?
ii. Outline three activities that can result in oxygen debt.

ANS: a)
b) (i) During breathing out/expiration/exhalation; not all the air is removed from the lungs; the air left inside the lungs during breathing out is residual air.
(ii) air is left in the lungs so that the lungs do not collapse;
air is always left inside the lungs so that more oxygen can be removed (diffuse) into the bloodstream.
(c)
(d) i. The build-up of lactic acid; during strenuous exercise is poisonous and makes the muscles ache; oxygen is needed to break down/get rid of the lactic acid; that is why athletes continue breathing heavily even after the exercise is over; the oxygen needed to get rid of the lactic acid is known as oxygen debt.
ii. Running; boxing; swimming /any correct example of strenuous activities.

2. (a) (i) What is sexual reproduction?
(ii) Name four organs in mammals that produce sex hormones.
(iii) Name one sex hormone produced by each of the organs named in 2(a)(i).
(b) In a tabular form outline three differences between reproductions in lizards and birds.
(c) (i) How are identical twins forms in humans?
(ii) State three characteristic features of identical twins.

3. (a) Define the term osmosis.
(b) State two ways each in which osmosis is of importance to;
(i) plants;
(ii) animals.
(c) A normal terrestrial plant was watered daily with a hypertonic solution for about seven (7) days. It was discovered that the plant was not doing well. Explain why.
(d) (i)Explain briefly how marine organisms overcome the problem of high salinity in their environment?
(ii) List four examples of organisms found in the benthic zone of marine habitat.

4. (a)  (i) What is conservation?
(ii) State six factors responsible for the decline of the abundance and variety of wildlife.
(b) Outline six ways in which the government can improve the situation in 4(a) (ii) above.
(c) (i) What is Eutrophication?
(ii) State two causes of eutrophication.

5. (a) What is reproduction?
(b) In a tabular form, state six differences between sexual reproduction and
(c) asexual reproduction.
(d) State three advantages of sexual reproduction.
(e) (i) Describe the female reproductive structure of a flowering plant.
(ii) List two factors necessary for the germination of seeds.

6. (a) (i) What is courtship behaviour?
(ii) Outline five benefits derived from the exhibition of courtship behaviour.
(b) Describe briefly courtship behavior in the Agama lizard.
(c) Describe briefly the mammalian placenta.

7. (a) Explain briefly the role of the skin as a sensory organ.
(b) Describe briefly the vegetation of Tropical Rain Forest.
(c) List five animals that inhabit the Tropical Rain Forest.

8.

Neco Biology Objective Questions 2022.

13. A plant has flowers whose anthers mature and fall off before the stigma is fully developed.
What will this prevent?
A cross-pollination
B insect-pollination
C self-pollination
D wind-pollination
E air pollination.

14. Under which set of conditions will the transpiration rate of a well-watered plant be fastest?
A a cool, dry, windless day
B a cool, rainy, windy day
C a hot, dry, windy day
D a hot, rainy, windy day
E a dry, dry, rainy day.

15. Which bones form a joint at the shoulder?
A humerus and scapula
B humerus and ulna
C radius and ulna
D radius and scapula
E femur and collar bone.

16. A motor neuron transmits impulses from
A muscle to the spinal cord
B receptor to muscle
C receptor to the spinal cord
D spinal cord to muscle.

17. Where are most nitrogen compounds excreted from humans?
A kidneys
B liver
C rectum
D skin
E bladder.

18. The cell wall of a plant cell is removed using an enzyme. What would happen if this cell is then placed in distilled water?
A It would take longer for the cell to become turgid
B Proteins in the cytoplasm would leave through the cell membrane
C The cell would become smaller as water passes out
D The cell would burst as water moves into it.

19.

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Keep following, more questions and answers will be added soon.