NECO 2021/2022 Biology Theory/Obj Questions and Answers is out

NECO 2021/2022 Biology obj/theory questions and answers is out .

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Paper 111

Answer all questions Each question is followed by five options lettered A - E. Choose the correct option for each question and shade, in pencil, on your answer sheet, the answer space that bears the same letter as the option you have chosen. 

Give only one answer to each question and erase completely any answer you wish to change. 

Do all rough work on this question paper,
An example is shown below.
Which of these organisms is unicellular?

A. Fem
Grass
Moss 
D. Paramecium
Spirogyra The correct option is 'paramecium' which is lettered 
D. Therefore, letter D would be shaded.
[A] [B] [C] post [E]

1.
The branch of biology that deals with the study of plants is called
The wearing away of the top soil by wind or water is called
aeration. cultivation erosion. leaching weathering.

E
Lateral line in fishes helps to detect
botany. 
ecology paleontology virology
zoology. 
Which of the following is not a beneficial effect of microorganisms? 

A. Causes of food spoilage
Facilitates fermentation Maintenance of soil fertility Production of antibiotics Sewage decomposition
food. light prey sound. vibration



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BIOLOGY OBJ:
1-10: BBEADBEEEC
11-20: DADBDCDDDB
21-30: ADECBDADEC
31-40: DADAAAACBA
41-50: BCEABCCCDB
51-60: EABBDDCCBB

(2ai)
gene is a sequence of DNA or RNA which codes for a molecule that has a function . During gene expression , the DNA is first copied into RNA .

(2aii)
Implantation : The act of setting in firmly . In embryology , implantation refers specifically to the attachment of the fertilized egg to the uterine lining , which occurs approximately 6 or 7 days after conception (fertilization) .
(2aii)
group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding. The species is the principal natural taxonomic unit , ranking below a genus and denoted by a Latin binomial , e. g . Homo sapiens .
(2aiv)
A saprophyte or saprotroph is anorganism which gets its energy from dead and decaying organic matter.

(2bi)
(i) It gives support and shape to the body
(ii) It helps in the production of white blood cells
(iii) It aids free movements
(iv) It helps in the attachment of muscles

3aii)
Plant cell
(i) presence of cell wall
(ii) presence of chloroplast
(iii) Presence of sparse cytoplasm
(iv) presence of small vacuole
(v) Absence of centrosome

Animal cell
(i) Absence of cell wall
(ii) Absence of chloroplasts
(iii) Presence of dense cytoplasm
(iv) Presence of small vacuole
(v) Presence of Centrosome

(4ai)
Diffusion is the movement of (molecules atoms ions) from a region in which they are in higher concentration until an equilibrium is established
(4ai)
Osmosis this is a spontaneous movement of water molecules through a semi-permeable membrane into a region of higher solute concentration
(4aii)
Plasmolysis this is a shrinking away of protoplam linear from a cell wall of a paintor bacterium due to water loss from osmosis

(4b)
(i) lack of sleep
(ii) lack of privacy
(iii) poor hygiene

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