WAEC Past Questions and Answers - Page 3701

18,501.

Animal cells are different from plant cells because animal cells have

A.

definite cell wall

B.

large vacuole

C.

centrioles

D.

Chloroplast

Correct answer is C

No explanation has been provided for this answer.

18,502.

Which part of part of plant cell contains cellulose?

A.

Vacuole

B.

Cytoplasm

C.

Cell wall

D.

Chloroplast

Correct answer is C

No explanation has been provided for this answer.

18,503.

Which of the following organism has both plant and animal-like features

A.

Paramecium

B.

Euglena

C.

Amoeba

D.

Spirogyra

Correct answer is B

No explanation has been provided for this answer.

18,504.

P varies directly as Q and inversely as R. When Q = 36 and R = 16, P = 27. Find the relation between P, Q and R.

A.

\(P = \frac{Q}{12R}\)

B.

\(P = \frac{12Q}{R}\)

C.

\(P = 12QR\)

D.

\(P = \frac{12}{QR}\)

Correct answer is B

\(P \propto \frac{Q}{R}\)

\(P = K \frac{Q}{R}\)

When Q = 36, R = 16, P = 27

Then substitute into the equation

\(27 = K \frac{36}{16}\)


\(K = \frac{27 \times 16}{36}\)

\(K = 12\)

So the equation connecting P, Q and R is

\(P = \frac{12Q}{R}\)

18,505.

y varies directly as w2. When y = 8, w = 2. Find y when w = 3

A.

18

B.

12

C.

9

D.

6

Correct answer is A

\(y \propto w^2\)

y = kw2

8 = k(2)2

8 = k(4)

k = 8/4

k = 2

Thus y = 2w2
When w = 3, y = 2(3)2

y = 2 x 9 = 18