Question 1 of 20 2,099 total questions
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
Which of the labelled parts is responsible for the release of ripe ovum?
Which of the following indicates the direction of the movement of a sperm
A III → II → I → IV
B VI → V → IV → I
C V → IV → I → III
D VI → IV → I → III
In which of the labelled structures does implantation take place?
The structure labelled I is the
A oviduct
B ovary
C uterus
D funnel
Hypermetropia is corrected by the use of
A concave lenses
B convex lenses
C cylindrical lenses
D contact lenses
Which of the following statements about short sight is not correct?
A The eyeball is too short
B The cornea of the eyeball is too curved
C The images fall in front of the retina
D It can be corrected by using concave lenses
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