Question
In sexual reproduction in humans, why are sperm cells produced in much greater numbers than
egg cells?
A More than one sperm cell fertilizes an egg.
B Sperm cells are small in size.
C Sperm cells live for only a short time.
D The chance of one sperm cell reaching an egg is very small.
Answer/Explanation
Ans
D
Question
Which describes a human male gamete?
Answer/Explanation
Ans
B
Question
The diagram shows a sperm cell.
Which part contains mitochondria to release energy for movement?
Answer/Explanation
Ans: B
Question
What will happen if a woman smokes during pregnancy?
A Nicotine can cross the placenta and affect the fetus.
B Nicotine can cause COPD in the lungs of the fetus.
C The woman can become addicted to carbon monoxide.
D Carbon monoxide can cause cancer in the lungs of the fetus.
Answer/Explanation
Ans
A