WAEC Biology Past Questions & Answers - Page 55

271.

In a complete dominance monohybrid cross between a pure breeding yellow-flowered plant Y and a pure breeding white-flowered plant y, the result of the first filial generation is _________

A.

50% yellow flowers

B.

75% yellow flowers

C.

all yellow flowers

D.

all white flowers

Correct answer is C

No explanation has been provided for this answer.

272.

Which of the following nucleotides is not found in the DNA molecules?

A.

Adenine

B.

Cytosine

C.

Guanine

D.

Uracil

Correct answer is D

No explanation has been provided for this answer.

273.

The process is called_______

A.

replication

B.

cell maturation

C.

crossing over

D.

mutation

Correct answer is A

No explanation has been provided for this answer.

274.

The diagram below is an illustration of a process occurring in a living animal cell. Study it and answer this question

The process occurs in the _______

A.

Nucleus

B.

Mitochondrion

C.

Golgi body

D.

Cytoplasm

Correct answer is A

No explanation has been provided for this answer.

275.

Individuals with blood group AB can donate blood to individuals with blood group(s)___________?

A.

A and B

B.

A and O

C.

AB only

D.

O only

Correct answer is C

Donors with blood type AB can donate to recipients with blood type AB only.

Donors with blood type O can donate to recipients with blood types A, B, AB and O (O is the universal donor)