JAMB Biology Past Questions & Answers - Page 423

2,111.

The cilia in paramecium are use for

A.

respirating

B.

locomotion

C.

protection

D.

regulating food intake

E.

 excretion

Correct answer is B

Cilia have important functions in the life of Paramecium, such as locomotion through the surrounding water and ingestion of food into the cytostome.

2,112.

People suffering from myopia

A.

can see near object clearly

B.

can see far away object clearly

C.

cannot see any object clearly

D.

are colour blind

E.

are able to see clearly in the dark

Correct answer is A

Myopia is another name given to short- sightedness. Affected persons see close objects clearly but far objects are blurry and would take correction to get from a distance fixed on their retina.

2,113.

One of the function of xylem is

A.

strengthening the stem

B.

manufacturing food

C.

reducing loss of water

D.

conducting manufactured food

E.

storing unused sugar

Correct answer is A

.Xylem plays an essential 'supporting' role providing strength to tissues and organs, to maintain plant architecture and resistance to bending.

2,114.

Given the equation:
6CO2 + 6H2O → C6H12O6 + 6O2 {Under sunlight & Chlorophyll)
The oxygen given off during the above process is derived from

A.

sunlight

B.

chlorophyll

C.

carbon dioxide

D.

atmosphere

E.

water

Correct answer is E

The oxygen given of by plants is from WATER which is split during photolysis(splitting of water by sunlight).

2,115.

A plant which grows on another plant without apparent harm to the host plant is called

A.

a parasite

B.

an epiphyte

C.

a saprophyte

D.

a predator

E.

 a hermaphrodite

Correct answer is B

Epiphytes, which differ from parasites in the sense that epiphytes grow on other plants for physical support and do not necessarily negatively affect the host. Hence, epiphytes show no apparent harm to the host plant.