JAMB Biology Past Questions & Answers - Page 317

1,581.

Use the list of ecological constituents below to answer the question below

1. Mango
2. Spear grass
3. Goat
4. Sheep
5. Temperature
6. Beans
7. Rock
8. Water
 

The physical factors are represented by

A.

1, 5, 6

B.

4, 5, 7

C.

5, 7, 8

D.

6, 7, 8

Correct answer is C

No explanation has been provided for this answer.

1,582.

Use the list of ecological constituents below to answer the question below

1. Mango
2. Spear grass
3. Goat
4. Sheep
5. Temperature
6. Beans
7. Rock
8. Water

Items 1-4 can be regarded as

A.

a population

B.

a community

C.

an ecosystem

D.

a niche

Correct answer is B

A community is a group or association of populations of two or more different species occupying the same geographical area and in a particular time.

1,583.

The process of soil erosion is usually from

A.

rill → sheet → gully

B.

gully → rill → sheet

C.

sheet → guly → rill

D.

sheet → rill → gully

E.

rill → gully → sheet

Correct answer is D

No explanation has been provided for this answer.

1,584.

Leaching is 

A.

Washing away of humus from the soil surface

B.

reducing of soil aeration by pressure

C.

soil erosion by means other than rainfall

D.

loss of organic matter due to exposure to direct sunlight

E.

washing out chalk and limestone from upper layers of by heavy rains

Correct answer is A

No explanation has been provided for this answer.

1,585.

Denitrifying bacteria in nature liberate gaseous nitrogen directly from 

A.

ammonium salts

B.

soil nitrates

C.

thunderstorms

D.

soil nitrites

E.

plant and animal proteins

Correct answer is B

No explanation has been provided for this answer.