O-Level Combined Science — Biology 4

Question 1

What type of reproduction requires only one parent and produces genetically identical offspring?

Accepted Answer

Asexual reproduction

Answer

Asexual reproduction involves only one parent and produces offspring that are genetically identical (clones) to the parent.

Question 2

What is the role of the pancreas in digestion?

Accepted Answer

Produces digestive enzymes

Answer

The pancreas produces digestive enzymes (amylase, lipase, protease) that are released into the small intestine to break down food.

Question 3

Which gas do plants absorb from the air for photosynthesis?

Accepted Answer

Carbon dioxide

Answer

Plants absorb carbon dioxide (CO₂) from the air through their stomata and use it as a raw material for photosynthesis.

Question 4

What is natural selection?

Accepted Answer

Organisms with favourable traits surviving and reproducing more successfully

Answer

Natural selection is the process by which organisms with advantageous traits are more likely to survive, reproduce, and pass on those traits to offspring.

Question 5

Which structure controls what enters and leaves the cell?

Accepted Answer

Cell membrane

Answer

The cell membrane (plasma membrane) is selectively permeable, controlling the movement of substances into and out of the cell.

GCE O-Level Practice Test

GCE O-Level Practice Test

O-Level Combined Science — Biology 4