Jamb Biology 2016 Past Questions and Answers

Question 31:

• JAMB 2016

The activity of ptyalin is likely to decrease with an increase in the concentration of

A. Oxygen
B. Starch
C. Protein
D. Acid

Question 32:

• JAMB 2016

Seed plants are divided into

A. Monocoty ledons and dicotyledons
B. Tracheophytes and ferns
C. Angiosperms and gymnosperms
D. Thallophytes and bryophytes

Question 33:

• JAMB 2016

The adaptive importance of the nuptial flight from termite colonies is to

A. Ensure cross-breeding between members of one colony and another
B. Disperse the reproductives in order to establish new colonies
C. Provide abundant food for birds and other animals during the early rains
D. Expel the reproductives so as to provide enough food for other members

Question 34:

• JAMB 2016

The sequence of the one-way gaseous exchange mechanism in a fish is

A. Gills ⇢ operculum ⇢ mouth
B. Mouth ⇢ gills ⇢ operculum
C. Mouth ⇢ operculum ⇢ gills
D. Operculum ⇢ mouth ⇢ gills

Question 35:

• JAMB 2016

In the nitrogen cycle, the nitrates in the soil are converted to atmospheric nitrogen by

A. Puterfying bacteria
B. Nitrogen-fixing bacteria
C. Nitrifying bacteria
D. Denitrifying bacteria