WAEC Biology Past Questions & Answers - Page 247

1,231.

Two tall plants were crossed; some of their offsprings were tall and others short the possible genotypes of the parent plants were

A.

TT and TT

B.

TT and tt

C.

Tt and Tt

D.

Tt and TT

Correct answer is C

No explanation has been provided for this answer.

1,232.

Which of the following orders correctly represents the trend in eutrophication? 

A.

Lack of oxygen → Death of aquatic organisms → Massive algal growth

B.

Excess nitrates and phosphates → Massive algal growth → Lack of oxygen → Death of aquatic organisms

C.

Heavy mineralization → Lack of oxygen → Massive algal growth

D.

Excess nitrates and phosphates → Lack of oxygen → Massive algal growth → Death of aquatic organisms

Correct answer is B

No explanation has been provided for this answer.

1,233.

The physical and chemical factors that affect the life of organisms in an environment are described as

A.

biotic

B.

edaphic

C.

abiotic

D.

physiographic

Correct answer is C

No explanation has been provided for this answer.

1,234.

The ventricles of the mammalian heart have thicker muscular walls than the auricles because the

A.

ventricles are larger

B.

ventricles receive more blood

C.

ventricles pump blood to longer distances

D.

auricles have smaller capacity

Correct answer is C

No explanation has been provided for this answer.

1,235.

Which of the following vertebrae provide articulation surfaces for the ribs?

A.

Thoracic

B.

Lumbar

C.

Cervical

D.

Sacral

Correct answer is A

No explanation has been provided for this answer.