Question 16:

• JAMB 2019

The sex ratio of any population may be affected by

A. Mortality
B. Migration
C. Morbidity
D. Fertility

Question 17:

• JAMB 2019

An igneous rock with distinct grains of mica, fieldspar and quartz is

A. Schist
B. Basalt
C. Granite
D. Rhyolite

Question 18:

• JAMB 2019

An example of a landform produced by glaciation is

A. Horizon
B. An ox-bow lake
C. A cirque
D. A sand-dune

Question 19:

• JAMB 2019

The Stevenson's screen is raised about one meter above the ground in order to avoid

A. The influence of strong winds
B. The heat from the ground
C. The effects of nearby trees
D. Rain drops entering it

Question 20:

• JAMB 2019

In surveying, it is best dealt with by

A. Using abney level
B. Removing them
C. Laying offsets
D. Avoiding them