Question 1 of 20 2,572 total questions
What proportion of the offspring of a cross between two heterozygous parents will exhibit the recessive condition phenotypically
Genetic counselling is important when a marriage is planned between a
A Rh- woman and Rh man+
B Rh- woman and Rh- man
C Rh+ woman and Rh+ man
D Rh+ woman and Rh- man
The first four children of a couple were all girls. The probability that the fifth will also be a girl is
If XN is the dominant allele for normal vision and Xn the recessive allele for colour blindness, a boy with the genotype YXn will be
A have normal vision
B be colour-blind
C be totally blind
D be a carrier of colour blindness
In a population of living things, the parameters of size, height, weight and colour are examples of
A discontinuous variation
B continuous variation
C physiological variation
D non-heritable variation
To select and retain the desirable trait of large body size which a farmer has observed in his herd, the farmer needs to
A feed the animals in the herd with more food
B cross-breed his animals with a different herd
C inbreed the animals in his herd
D prevent disease in herd
The gland usually found in the position labelled I is the
A adrenal
B thyriod
C pancreatic
D pituitary
The structure labelled I represented the
A phloem
B xylem
C cortex
D pericycle
The function of the absorption is performed by the structure labelled
Tissue respiration is important for the
A absorption of oxygen into the alveoli
B release of carbon (IV) oxide into the lungs
C release of energy for the body use
D exhalation of carbon(IV) oxide from the lungs
A person that is obese must avoid meals containing
A `carrots and oranges
B margarine and butter
C beaf and beans
D rice and yam
In which of the following groups of fruits is the pericarp inseparable from the seed coat?
A Nut
B Follicle
C Cypsela
D Crayopsis
The organ located within the duodenal loop in the mamal is the
A spleen
B pancreas
C liver
D gall bladder
The mode of nutrition exhibited by a tapeworm is
A symbiotic
B saprophytic
C parasitic
D holozoic
Which of the following pairs of organ is located in the anterior half of the mammalian body cavity?
A Kidneys and lungs
B Heart and ovary
C Lungs and heart
D Kidneys and heart
When a marine fish was taken from the ocean and put in a tank of fresh water, it died after a short period because
A the tank was too small compare to the large ocean
B the body cells of the fish swelled and burst as a result of the hypotonic fresh water
C the body cells of the fish shrank as their sap was hypertonic to the fresh water
D there was no food in the tank, so the starved.
The experimental set-up can be used to demonstrate that
A light is necessary for photosynthesis
B oxygen is necessary for photosynthesis
C photosynthesis occurs in the leaves of plants
D carbon (IV) oxide is necessary for photosynthesis
Which of the following statement is correct about the experiment?
A The flask must be of the conical type
B Caustic soda can be replaced with distilled water
C The enclosed leaf will lose its green colour
D The leaves outside the flask serve as control
The capture and digestion of insects by a pitcher plant is a special form of nutrition termed
A autotrophic
B heterotrophic
C chemosynthetic
D saprophytic
The presence of endoskeleton is characteristic of
A invertebrata
B vertebrata
C insecta
D coelenterata
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