Question 1 of 20 61 total questions
Which of the following organisms causes syphilis?
A Mycobacterium tuberculosis
B Bordetella pertusis
C Treponema pallidlum
D Clostridium tetani
Only specially adapted micro-organisms are found in
A salty water
B humid air
C moist soil
D mouth cavities
Which of the following statements is true about movement of the forearm? In
A bending the arm, the biceps relax and the triceps contract
B bending the arm, the biceps contract and the triceps relax
C straightening the arm the biceps contract and the triceps relax
D straightening the arm, both biceps and triceps contract
The basis of growth involves the following processes except
A cell reduction
B cell division
C cell differentiation
D cell enlargement
The role of ATP include all the following activities except
A provision of energy to do work in living organisms
B transmission of nerve impulse
C keeping the body warm in homoithermic animals
D producing water during aerobic respiration
Raw materials required by green plants to manufacture their food are
A mainly fluids
B inorganic substances
C living materials
D mainly gases
Which of the following statements defines plasmolysis?
A Shrinking of a plant cell in a solution
B Shrinking away of cytoplasm from an animal cell membrane
C Shrinking away of the cytoplasm from the plant cell wall
D shrinking of the vacuole and leaving the cytoplasm attached to the cell wall
Which of the following substance pass through the root cell membrane by osmosis?
A Cell sap
B Carbon dioxide
C oxygen
D water
In active transport, molecules move against a concentration gradient, therefore
A molecules move from a region of low concentration to a region of high concentration
B molecules move from a region of high concentration to a region of low concentration
C the concentration gradient has little effect on the movement of molecules
D molecules force their way through special channels
Which of the following Best explains why It is difficult to see clearly in dim light?
A Initially the eyes cannot operate when the light is dim
B The choroid reflect all the light that enters the eye
C Too little light reaches the retina and so the cones may not be stimulated at all
D Dim light causes the pupil to close up so that not much light enters the eye
Which of the following pairs of organisms exist as colonies?
A Obelia and Euglena
B Pandorina and Volvox
C Chlamydomonas and Amoeba
D Hydra and Spirogyra
Which of the following pairs of organisms are photosynthetic?
A Amoeba and Paramecium
B Volvox and Rhizopus
C Chlamydomonas and Euglena
D Nostoc and Plasmodium
Which of these organs can be considered vestigial in humans but functional in other mammals? The
A liver
B appendix
C rectum
D stomach
A serious disadvantage of complexity in higher organisms is
A a high demand for food and energy
B ability to function in many specialized roles
C little amount of energy dissipated in functioning
D specialization of parts of the body
One important characteristic of green plants is that they
A possess specialized sense organs
B are usually motile
C are autotrophic
D respond slowly to stimuli
The main similarity between unicellular and multicellular organisms is that both
A perform all life activities
B exist as filaments
C are plants
D exist as colonies
Which of the following adaptation is no found in fruits and seeds dispersed by the win '?
A Small and light body
B Spongy coats
C Turfs of hairs
D Wings on pericarp
A mayor difference between plants and animals is that
A there is free movement in animals while this is limited in plants
B there is indefinite growth in animals only
C animals consume inorganic materials as food, while plants consume organic materials
D animals give up carbon-dioxide as a waste product of respiration while plants do not.
A virus can sometimes be regarded as a living organism because it
A causes disease in plants and animals
B exists in a variety of shapes
C reproduces in living cells
D is easily visible with the aid of an electron microscope
The group mollusca is characterized by the presence of
A jointed appendages
B star-shaped bodies
C backbones
D Soft, non-segmented
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