Biology 2011 | Study Mode

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Question 21
A
operculum gills mouth
B
gills operculum mouth
C
mouth operculum gils
D
mouth gills operculum
Explanation

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Correct option: D
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Question 22
A
budding
B
sporulation
C
fragmentation
D
fission
Explanation

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Correct option: D
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Question 23
A
they are rivals
B
all animals rely on food produced by plants
C
they utilize respiratory wastes of each other
D
they are neighbours
Explanation

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Correct option: C
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Question 24
A
16.7%
B
17.6%
C
26.7%
D
16.2%
Explanation
Mass of Soil = 101.5 - 80.5 = 21.0g
Mass of humus = (99.0 - 95.5)g = 3.5g
% of humus = \(\frac{3.5}{21.0} \times \frac{100}{1}}
= 16.7%

Correct option: A
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Question 25
A
shark
B
butterfly
C
whale
D
mosquito
Explanation
Filter feeding is a method of aquatic feeding in which the animal takes in many small pieces of prey at one time.

Correct option: C
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Question 26
A
long lifespan
B
low birth rate
C
low death rate
D
short lifespan
Explanation

Mortality rate is another way to say death rate. It is a measure of the number of deaths due to a particular cause in a population. Mortality rate (or death rate) is usually expressed in units of deaths per 1,000 per year


Correct option: C
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Question 27
A
niche
B
a food chain
C
an ecosystem
D
a mirohabitat
Explanation

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Correct option: C
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Question 28
A
female Aedes mosquito
B
female Anophelous mosquito
C
male Culex mosquito
D
female Culex mosquito
Explanation

The blood stage parasites are those that cause the symptoms of malaria. When certain forms of blood stage parasites (gametocytes, which occur in male and female forms) are ingested during blood feeding by a female Anopheles mosquito.


Correct option: B
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Question 29
A
Hydrometer
B
Thermometer
C
Hygrometer
D
Anemometer
Explanation

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Correct option: C
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Question 30
A
liver of humans
B
reticuloendothelial cells of humans
C
Malphigian tubules of mosquito
D
brain of humans
Explanation

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Correct option: A

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