JAMB Biology Past Questions & Answers - Page 239

1,191.

The response of plants to external stimuli in a non-directional manner is known as 

A.

Tactic movement

B.

Phototropism

C.

Geotropism

D.

Nastic movement

Correct answer is D

Plant movements that are independent of the direction of the stimulus or that are caused by non-directional stimuli are called nastic movements.

1,192.

An example of a caryopsis is

A.

Guava

B.

Maize grain

C.

Coconut

D.

Tomato

Correct answer is B

No explanation has been provided for this answer.

1,193.

Homologous pairs of chromosome separate during

A.

Cytolysis

B.

Cleavage

C.

Mitosis

D.

Meiosis

Correct answer is D

No explanation has been provided for this answer.

1,194.

Metabolic production of urea is carried out in the

A.

urinary bladder and kidney

B.

Liver

C.

Pancreas

D.

Kidney and malphigian tubule

Correct answer is B

All the metabolic wastes are excreted in a form of water solutes through the excretory organs (nephridia, Malpighian tubules, kidneys), with the exception of CO2, which is excreted together with the water vapor throughout the lungs. The elimination of these compounds enables the chemical homeostasis of the organism. Urea is produced in the liver and is a metabolite.

1,195.

In mammalian males, the excretory and reproductive systems share the

A.

Ureter

B.

vas deferens

C.

Urethra

D.

Testes

Correct answer is C

No explanation has been provided for this answer.