Question 1 of 20 5,032 total questions
The distribution of organisms in a fresh - water habitat like a stream or pond is determined by the following
A rainfall
B temperature
C pH of soil
D light penetration
E tidal movements
Which of the following conditions is not necessary for photosynthesis to occur in plants?
A There must be light
B There must be xylem tissue used to conduct water
C There must be chlorophyll to trap radiant energy
D Carbondioxide must be present
E Water must be present
Which of these processes removes carbon from the atmosphere?
A Putrefaction of animals
B Burning of fuels
C Photosynthesis
D Volcanic eruption
E Respiration in plants
At the end of photosynthesis, the green leaf is tested for starch and not glucose, because
A the glucose is used up immediately to provide energy for the needs of the leaf
B the glucose formed is immediately converted to starch
C starch is stored only in leaves
D there are no chemicals for glucose test in leaves
E it is easy to test for starch
Which of the following organisms has a symbiotic relationship with green algae?
A Amoeba
B Paramecium
C Hydra
D Euglena
E Chlamydomonas
The series of changes that occur in a seed by which the embryo develops into a seedling is known as
A fertilization
B gametogenesis
C pollination
D germination
E regeneration
Which of the following is an advantage of dispersal of fruits and seeds? It allows
A fair distribution of source of food for animals
B growth in close association with parent plant
C even distribution of plants and reduction of intraspecific competition
D keen competition for food
E the seeds to evolve new species
Which of the following statements is not correct?
A Shortage of food may be caused by pestilence, rinderpest and neglect of farming
B Shortage of food may lead to competition, emigration, death and decline in the rate of reproduction
C Over-crowding may lead to scarcity of food
D Dispersal of seeds and fruits prevents overcrowding
E Territorial defence encourages food scarcity in a habitat
Which of the following structures are characteristics of insect pollinated flowers?
A Dull coloured flowers with no nectar
B Very light numerous and pendulous stamen
C Brightly coloured petals, scent nectar
D Flowers are usually small and inconspicuous
E Stigma are large, feathery and hang outside the flower
The term syncarpous is used to describe a flower when the carpels are
A many and fused
B two only
C two and separate
D many and free
E lying at different parts of a flower
The following are directly involved in transmission of sound waves to the brain except
A eardrum
B auditory meatus
C auditory ossicles
D eustachian tube
E cochlea
Which of the following statements is false?
A Human sense of smell is easily fatigued
B The skin can perceive the sensations of touch, pain, pressure and temperature
C Taste buds and olfactory cells are active when wet as well as when dry
D Sensory nerve endings receive stimuli and send to the central nervous system
E Senses of smell and taste can be weakened by catarrh or blocked nose.
Which of the following is the correct route of transmission of impulses along a reflex arc?
A Receptor → sensory neurone → synapse → intermediate neurone → synapse → motor neurone → effector
B Receptor → motor neutron e synapse → intermediate neurone → synapse → sensory neurone effector
C Receptor → synapse → sensory neurone → intermediate neurone → synapse → effector → motor neurone
D Effector → motor neurone → synapse → sensory neurone → synapse → intermediate neurone → receptor
E Effector → intermediate neurone → synapse → motor neurone → synapse → sensory neurone → receptor.
Which of the following is not a function of insulin?
A Accelerates the rate at which glucose is converted to glycogen
B Promotes the uptake of glucose by tissues
C Regulates the amount of glucose in the blood
D Accelerates the absorption of glucose at the glomerulus
E Stimulates muscles to oxidize glucose.
Hormones are transported around the mammalian body by
A water
B nerves
C blood
D osmosis
E diffusion
Reabsorption of the metabolic products along the kidney tubules is made possible by the
A closeness of the intestine to the kidney
B convoluted nature of the tubules
C presence of convoluted tubules in the medulla
D presence of network of capillaries around the convoluted tubules
E joining of the main collecting tubules to the kidney tubules
In the anaerobic stage of respiration, the net ATP molecules produced per
A one
B two
C three
D four
E five
The structure that will be stained blue-black by iodine is labelled
The part labelled ll is the
A stoma
B palisade cell
C spongy cell
D guard cell
E epidermal cell.
The function of the part labelled I is
A controlling water loss
B trapping solar energy
C absorbing water
D storing sugar
E transporting sugar
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