WAEC Past Questions and Answers - Page 4178

20,887.

The upper part of the trachea in mammals is called

A.

palate

B.

epiglottis

C.

larynx

D.

glottis

E.

bronchus

Correct answer is C

No explanation has been provided for this answer.

20,888.

The pulmonary vein carries 

A.

oxygenated blood from right ventricles to the lungs

B.

oxygenated blood from lungs to the left auricle

C.

deoxygenated blood from the lungs

D.

oxygenated blood from lungs to the right auricle

E.

deoxygenated blood from the right ventricle to the lungs

Correct answer is B

No explanation has been provided for this answer.

20,889.

The image of a pin formed by a diverging lens of focal length 10cm is 5cm from the lens. Calculate the distance of the pin from the lens

A.

-3.3cm

B.

3.3cm

C.

10.0cm

D.

15.0cm

E.

20.0cm

Correct answer is B

1/u - 1/v = 1/f; f = 10cm, v = 5cm
u = 10/3 = 3.3cm

20,890.

Which of the following tissues is not found in the stem and root of monocotyledons?

A.

Xylem

B.

Cambium

C.

Pith

D.

Cortex

E.

Pericycle

Correct answer is C

No explanation has been provided for this answer.