Question 181:

• JAMB 1980

Biconcave lenses are used in the correction of an eye defect called?

A. Myopia
B. Colour blindnes
C. Old age
D. Hypermetropia
E. Weakening of ciliary muscles

Question 182:

• JAMB 1980

The center which controls respiratory activities the mammalian brain is the

A. Cerebrum
B. Olfactory lobe
C. Pituitary organ
D. Cerebellum
E. Medulla

Question 183:

• JAMB 1980

A student trying to find out the order in which organisms appear on a cleared plot is studying one of the following

A. Ecosystem
B. Food chain
C. Food web
D. Succession
E. Community

Question 184:

• JAMB 1980

An organism X lives entirely on the waste products in another organism Y. In this association X is a

A. Symbiont
B. Commensal
C. Saprophyte
D. Parasite
E. Epiphyte

Question 185:

• JAMB 1980

The tips of some rice seedlings were cut off while some were left intact. Both were covered with a container which had not only one small hole to allow light through. After twenty-four hours it was observed that

A. The cut tips was bent away from the light
B. The cut tips bent towards source of light
C. The intact tips bent away from the light
D. The intact tips bent towards the light
E. Both tips bent away from light