Waec Biology Past Questions and Answers

Question 1701:

• WAEC 2017

Which of the following sequences is the correct route of the transmission of impulses along a reflex arc?

A. \(Receptor\to sensory neuron \to synapse \to intermediate neuron \to synapse \to motor neuron \to effector\)
B. \(Receptor \to motor neuron \to synapse \to intermediate neuron \to synapse \to sensory neuron \to effector\)
C. \(Effector \to intermediate neuron \to synapse \to motor neuron \to synapse \to sensory neuron \to receptor\)
D. \(Effector \to motor neuron \to synapse \to sensory neuron \to synapse \to intermediate neuron \to receptor\)

Question 1702:

• WAEC 2017

When viewing an object that is close to the human eye, the

A. Eye lens becomes thin
B. Ciliary muscles relax
C. Suspensory lens become taut
D. Eye lens becomes fat

Question 1703:

• WAEC 2017

The diagram above is an illustration of the human sperm. The part labelled I is the

A. Acrosome
B. Nucleus
C. Mitochondrion
D. Tail

Question 1704:

• WAEC 2017

In the diagram of the human sperm above, the function of the part labelled II is to

A. Fuse the ovum during fertilization
B. Generate the energy for the sperm to swim to the fallopian tube
C. Help the sperm to swim forward
D. Dissolve the membrane of the egg during fertilization

Question 1705:

• WAEC 2017

Which of the following types of placentation is not common amongst syncarpous pistils?

A. Marginal
B. Axile
C. Parietal
D. Free central