Question 1 of 20 5,032 total questions
Which of the following parasites is a flatworm?
A Plasmodium
B Trypanosoma
C Ascaris
D Schistosoma
Which of the following factors may not affect living organisms in an aquatic habitat?
A Turbidity
B Temperature
C Humidity
D Light
A situation whereby some mammals remain inactive throughout dry and hot seasons is known as
A aestivation
B dormancy
C burrowing
D incubation
Which of the following is a means of measuring primary production?
A Rate of reproduction of animals
B Life span of an organism
C Number of predators in an environment
D harvested plants in a unit area
Carbon is added to the atmosphere by the following processes except
A respiration
B burning
C photosynthesis
D volcanic eruption
A known weight of soil sample was oven-dried to obtain a constant weight. The loss in weight was due to
A organic matter only
B water only
C water and organic matter
D inorganic matter and water
Soil factors in an ecosystem are referred to as
A topographic
B climatic
C biotic
D edaphic
The secchi disc is used to measure
A speed of flow of water
B specific gravity of water
C turbidity of water
D depth of water
Desert plants are usually called
A hydrophytes
B mesophytes
C xerophytes
D sporophytes
Which of the following is not a biotic factor?
A Parasites
B Predators
C Grazers
D Pressure
Which of the following organisms can be found in fresh water habitat?
A Sargassum and dog fish
B Red mangrove and pond skater
C Sargassum and red mangrove
D Spirogyra and pond skater
Which of the following statements is true?
A Ptyalin acts on proteins to give amino acid
B Lactase acts on maltose to give amino acid
C Pepsin acts on proteins to give peptide
D Peptide acts on starch to give maltose
The dentition of a herbivore is distinct from that of other animals due to the presence of
A diastema
B cusps on molar teeth
C canines
D ridges on molar teeth
The importance of a balanced diet is to
A maintain constant size of an animal
B provide good taste in the food
C increase the effectiveness of digestion
D provide good health for an individual
In water- culture experiments the culture solutions are protected from sunlight in order to
A control the temperature of the culture solution
B prevent algae from growing in the solution
C prevent the minerals in the solution from being destroyed
D allow the minerals to be used up at room temperature
The factors required for the dark phase of photosynthesis are
A III and IV only
B III and V only
C III, IV and V only
D IV and V only
Which of the above factors can be a limiting factor for the process to proceed?
A I and II only
B I and III only
C I and IV only
D I, III and IV only
During photosynthesis, light energy is always absorbed by the
A shoot
B water
C chlorophyll
D enzyme
Which of the following is not a characteristics feature of a wind dispersed fruit?
A Lightweight
B winged apparatus
C Flossy structure
D Buoyancy
During germination of seeds water is taken by the process of
A diffusion
B hydrolysis
C imbibition
D translocation
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