Question 41
Which of the following traits in humans is not a morphological variation?
Options
A) Height
B) Shape of head
C) Colour of skin
D) Ability to roll the tongue
The correct answer is D.
Question 42
The blood group in humans referred to as a universal recipient is
Options
A) O
B) A
C) B
D) AB
The correct answer is D.
Question 43
If a heterozygous red flowered plant, (Rr) was self-fertilized, the offspring would be expected to be
Options
A) all red flowered plants
B) all white flowered plants
C) red flowered, white flowered plants
D) white flowered red flowered plants
The correct answer is C.
Question 44
The contrasting pair of genes affecting a trait and located at the same position on homologous chromosomes is referred to as
Options
A) chromatids
B) mutants
C) alleles
D) chromatin
The correct answer is C.
Question 45
The haploid number of chromosomes in humans is
Options
A) 48
B) 46
C) 24
D) 23
The correct answer is D.
Question 46
A pure breeding white cat (homozygous dominant) mates with a pure breeding black cat (recessive), what would be the fur colour of F1 generation
Options
A) Homozygous white
B) Homozygous black
C) Heterozygous white
D) Heterozygous black
The correct answer is C.
Question 47
Courtship behaviour in animals may include all of the following except
Options
A) howling of a dog
B) dancing of the worker bee
C) croaking of a toad
D) basking in the sun by a lizard
The correct answer is D.
Question 48
Honey-Bee workers carry out the following functions except
Options
A) laying eggs
B) building nests
C) cleaning the nest
D) gathering food
The correct answer is A.
Question 49
The long necks and legs of the present day giraffes were some of the basis of
Options
A) Darwins' theory of evolution
B) Mendel's theory of inheritance
C) Lamarck's theory of evolution
D) De Vries theory of evolution
The correct answer is C.
Question 50
A change in the environment of an organism is termed
Options
A) sensitivity
B) impulse
C) response
D) stimulus
The correct answer is D.
Question 51
Organisms that interbreed to produce fertile offspring belong to the same
Options
A) class
B) family
C) species
D) order
The correct answer is C.
Question 52
The transfer of ripe pollen grains from the anther to the stigma of the same flower is termed
Options
A) fertilization
B) self-pollination
C) reproduction
D) conjugation
The correct answer is B.
Question 53
The hereditary material in a living organism is located inside the
Options
A) protein wall
B) cytoplasm
C) nucleus
D) lysosome
The correct answer is C.
Question 54
Respiration is an essential life process providing the living cells with
Options
A) oxygen
B) sugars
C) energy
D) carbon dioxide
The correct answer is C.
Question 55
The organelle involved in the transport of substances within a cell is
Options
A) Golgi body
B) endoplasmic reticulum
C) ribosome
D) mitochondrion
The correct answer is A.
Question 56
Which of the following processes takes place when a plant cell is put in a hypotonic solution?
Options
A) Water moves into the cell and the cell bursts
B) Water leaves the cell and the cell becomes flabby
C) Water moves into the cell and the cell becomes turgid
D) The cell becomes plasmolysed
The correct answer is C.
Question 57
The dominant stage in the life cycle of a fern is the
Options
A) antheridium
B) gametophyte
C) prothallus
D) sporophyte
The correct answer is D.
Explanation:
Question 58
Yeast is added to the dough during the preparation of bread because it produces
Options
A) ethanol
B) heat
C) carbon dioxide
D) carbohydrate
The correct answer is C.
Question 59
Growth includes the following processes except
Options
A) differentiation
B) enlargement
C) mitosis
D) meiosis
The correct answer is D.
Question 60
Which of the following processes is a form of sexual reproduction?
Options
A) Budding by yeast cells
B) Conjugation in Spirogyra
C) Binary fission in Amoeba
D) Rhizome production by ginger
The correct answer is B.
LOADING MORE...............