BIOLOGY | Study Mode

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Question 31
A
epiphytism
B
saprophytism
C
commensalism
D
symbiosis
Explanation
Fern and oil-palm commensalism. The epiphyte (fern) get enough sunlight to carry out photosyntehsis by climbing on the palm oil tree. In commensalism association, one partner benefits while the other, the host is unaffected c.

Correct option: C
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Question 32
A
dioecious
B
predation
C
monoecious
D
hermaphrodite
Explanation
Plants in which both pistillate and staminate flowers are borne on the same plant are called Monoecius. Diecious is when pistillate and staminate are on separate plant. Monoecius encourage imbreeding c.

Correct option: C
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Question 33
A
competition
B
predation
C
parasitism
D
commensalism
Explanation
Competition involves the interactions among two organism of the same species or different species in which one outgrow or survive (A)

Correct option: A
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Question 34
A
fibrous roots
B
succulent stems
C
perennating organs
D
rapid growth rate
Explanation
This is because of their fibrous roots which germinate rapidly and are fire resistance (A)

Correct option: A
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Question 35
A
resistance
B
competition
C
succession
D
adaptation
Explanation
Living organ-isms are found in different types of habitats. These organisms show feature that enable them to live successfully in these environments. These may be functional, behavioural or structurally. Such factures are called adaptation (D).

Correct option: D
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Question 36
A
perennial species
B
climax species
C
pioneer vegetation
D
annual species
Explanation
This is the final community or what ecologist call the Climax of the succession (B)

Correct option: B
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Question 37
A
chemosynthesis
B
saprophytism
C
parasitism
D
symbiosis
Explanation
Chemosynthesis is the synthesis of organic compounds from CO2 and H20 but the energy instead of coming form light is supplied by special method of respiration involving the oxidation of various inorganic materials such as hydrogen sulphide ammonia. Chemosynthesis is used by certain bacteria (A).

Correct option: A
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Question 38
A
leaf
B
kidney
C
heart
D
bone
Explanation
Bone is not an organ but a tissue (D)

Correct option: D
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Question 39
A
use and disuse
B
segregation of genes
C
evolution
D
independent assortment of genes.
Explanation
Mendelians first law of segregation states that contracting factors (i.e. genes are present in pairs in non-reproductive or somatic cells so that when an organism forms a gamete the pair separate (B)

Correct option: B
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Question 40
A
food chain
B
nutrition
C
consumer
D
food web
Explanation
Numerous food chains are present in an ecosystem and these are linked together in a food web (D).

Correct option: D

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