2021 - JAMB Biology Past Questions and Answers - page 2

11
In the mammalian respiratory system. exchange of gases occurs in the?
A

lungs

B

bronchi

C

bronchioles

D

alveoli

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12
Aged erythrocytes are destroyed in the?
A

pancreas

B

liver

C

lymph nodes

D

kidney

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13
The villus in the small intestine is significant because it?
A

increases the surface area for absorption

B

increases the surface area for digestion

C

assists in mixing digested food

D

assists in filtering undigested food

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14
Which of the following food substances will produce a brick-red colour when warmed with Benedict's solution?
A

Glucose

B

Starch

C

Egg White

D

Maltose

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15
The blood vessel which carries blood from the alimentary canal to the liver is the?
A

hepatic artery

B

hepatic vein

C

hepatic portal vein

D

mesenteric artery

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16
Which of the following is TRUE of the process of conjugation in Paramecium?
A

Micronucleus disintegrates

B

Each ex-conjugant divides only once

C

Macro nucleus undergoes division

D

Each micronucleus divides twice

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17
People who suck petrol with their mouths run the risk of increasing in their blood the concentration of
A

iron

B

lead

C

calcium

D

magnesium

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18
Which of the following is a measure for the control of bilharzia?
A

Cutting low bushes around homes

B

Application of molluscicides in water bodies

C

Screening windows and doors with mosquito nets

D

Application of herbicides in water bodies

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19
The appendicular skeleton is composed of the pectoral girdle?
A

pelvic girdle, fore and hind limbs

B

pelvic girdle and fore limbs

C

lumbar vertebrae and pelvic girdle

D

lumbar vertebrae, fore and hind limbs

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20
A freshwater plant such as water lily can solve the problem of buoyancy by the possession of?
A

aerenchyma tissues

B

dissected leaves

C

thin cell walls of the epidermis

D

water-repelling epidermis

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