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WorksheetsBiology (Past Questions)
Total questions: 50
Worksheet time: 28mins
Which of the following groups of animals do not possess a nervous system?
Porifera
Cnidaria
Platyheminthes
Nematoda
The structural similarities in Paramecium and Euglena are in the
shape of locomotory organs presence of anterior and posterior contractile vacuoles
blunt anterior and pointed posterior
presence of micro and mega nuclei in both
presence of anterior and posterior contractile vacuoles
Which of the following organisms cannot exist freely on its own?
Chlamydomonas
Amoeba
Paramecium
Plasmodium
Which of the following cell organelles is the site for the production of ATP?
Lysosome
Nucleus
Mitochondrion
Ribosome
An example of osmosis in plants is the
movement of water through the xylem
loss of water vapour from the stomata
translocation of food through the phloem
absorption of water from the soil by the root
The organism that can carry out both autotropic and heterotrophic modes of nutritions is
Chlamydomonas
Eudorina
Euglena
Spirogyra
upper arm
lower arm
upper leg
lower leg
Which of the labelled parts of the diagram of the part of the human skeleton articulates with the head of the trochlea to form a hinge joint?
I
II
III
IV
The diagram above illustrates a part of the human skeleton. The labelled part that provides surface for the attachment of the triceps is
I
II
III
IV
The diagram above illustrates the transverse section of a
dicotyledonous root
monocotyledonous root
dicotyledonous stem
monocotyledonous stem
Which of the following actions does not occur during exhalation in man?
Thoracic cavity decreases in volume
Diaphragm flattens
Ribs move down and in
Air pressure increases in the thoracic cavity
The diagram above is an illustration of the urinary tubule in a mammal. Which of the following substances is found in the part labelled II only?
Lipid
Glucose
Urea
Uric acid
The diagram above is an illustration of the urinary tubule in a mammal. The part which contains lowest concentration of urea is labelled
I
II
III
IV
The diagram above is an illustration of the urinary tubule in a mammal. Which of the following substances is greater in concentration in the part labelled IV when compared to that part labelled I?
Lipid
Glucose
Urea
uric acid
Deamination of amino acids in the liver produces
blood sugar
glycogen
bile
urea
Which of the following glands also serves as an exocrine gland?
Ovary
Pancreas
Adrenal
Thyroid
When viewing an object that is close to the human eye, the
eye lens becomes thin
ciliary muscles relax
suspensory lens become taut
eye lens becomes fat
In the diagram of the human sperm above, the part labelled I is
acrosome
nucleus
mitochondrion
tail
In the diagram of the human sperm above, the function of the part labelled II is to
fuse the ovum during fertilization
generate the energy for the sperm to swim to the fallopian tube
help the sperm to swim forward
dissolve the membrane of the egg during fertilization
Which of the following types of placentation is not common amongst syncarpous pistils?
Marginal
Axile
Prietal
Free central
The complex energy-rich organic matter which living organisms need for life is
Water
Air
Food
Mineral Salts
Which of the following processes are associated with photosynthesis? I. Energy from sunlight is absorbed II. Carbon dioxide is evolved III. Oxygen is given off IV. Glucose is synthesized
I and II only
I, II and IV only
I, III and IV only
I, II, III and IV
Which of the following function is associated with calcium in plants? Formation of
cell wall
ribosomes
proteins
cell membrane
The diagram above shows the dentition of an organism. What organism is this?
rabbit
cat
frog
man
The diagrams below show the dentition of an organism. The function of the teeth labelled X is for
biting and grasping
chewing and grinding
tearing and grasping
chewing and tearing
The teeth which are absent in the young of the organism whose dentition is shown above is labelled
W
X
Y
Z
The number of individuals that the environment can support over a long period of time is its
growth rate
total capacity
population capacity
carrying capacity
A good site for secondary succession would be
a sand dune
a bare rock
a land that has just had forest fire
a stretch of barren land
A population which exceeds its carrying capacity and then collapses is represented graphically by a
bell-shaped curve
linear curve
sigmoid curve
skewed curve
The natural dwelling place of an organism is called its
ecological niche
habitat
population
environment
Which of the following ecological factors will result in food shortage?
Drought
Low rate of reproduction
Emigration
Topography
Soil permeability refers to
how easily water passes through the soil
the proportion of air in the soil
the proportion of water the soil holds
how well water rises up the soil
Which of the following groups of organisms do not have members that can be called autotrophs?
Protists
Mosses
Chlorophyta
Fungi
Which of the following pyramids gives the most accurate picture of the relationships between at the various trophic levels in a food chain? A pyramid of
numbers
energy
biomass
size
Which of the following statements is not associated with pyramids of energy?
Efficiency of energy transfer between trophic levels can be studied
Comparisons of pyramids for different ecosystems can be made
More accurate comparisons of trophic levels
Representation of numbers of organisms at different trophic levels
Which of the following materials is not easily biodegradable?
Polythene bag
Cotton bag
Hides and Skin bag
Paper bag
Which of the following pairs of organisms is in a mutualistic relationship?
Hydra and Sea anemone
Hermit crab and Sea anemone
Dodder plant and Cocoa plant
Mistletoe and Kolanut
The establishment of game reserves and parks is a method of
conserving natural resources
cultivating game
controlling pollution
cultural awareness
Which of the following practices is not used in conserving water?
Afforestation
Damming
Deforestation
Reforestation
Which of the following resources cannot be renewed?
Air
Petroleum
Food crop
Soil
The type of variation illustrated above is
continuous variation
discontinuous variation
morphological variation
environmental variation
Which of the following characters is not a morphological variation?
shape of the nose
colour of skin
colour of hair
tongue rolling
An apple plant can produce sexually and asexually and it has 40 chromosomes in its leaf cells. How many chromosomes would be in each gamete and somatic cell?
20 chromosomes in the gametes and 10 in the somatic cells
40 chromosomes in the gametes and 20 in the somatic cells
20 chromosomes in the gametes and 40 in the somatic cells
40 chromosomes in the gametes and 40 in the somatic cells
Assuming that A is the gene for normal skin colour and is dominant, while a is the gene for albinism and its recessive, what is the likely genotype of the couple which had 50% normal and 50% albino offspring?
AA, aa
Aa, aa
AA, Aa
Aa, Aa
Which of the following statements is true about mutation?
Phenotype is not involved B. C. D.
Genotype is not involved
Artificial induction is not possible
Genotype is involved
One of the structural adaptations of mammals for movement on land is the development of the
hollow bones
pentadactyl limb
fused thoracic bones
streamlined body
Which of the following is NOT characteristic of social insects?
All members are identical
There is division of labour
The members dwell in the same habitat
Some members protect the queen
The gradual cumulative, adaptive and heritable changes in an organism over a long period of time resulting in new species is called
adaptation
survival
organic evolution
interspecific competition
Define nervous system
The CNS is made up of
(a)
