Biology | Study Mode

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Question 1
A
Producers
B
Food chain
C
Consumers
D
Saprophytes
Explanation.
Biomass takes into accounts both the size of the individual organisms and their numbers. The pyramid of biomass thus gives the accurate picture of the relationship between the organisms at the various tropic level in a food chain is just a mode of nutrition and its not relevant in this context (D).

Correct Option:
D
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Question 2
A
Thermocines
B
Homotherms
C
Poikilotherms d Sternotherms
Explanation.
Homiotherms (Greek: homois: similar) animals keep their body temperature more or less constant, regardless of their surrounding (B).

Correct Option:
B
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Question 3
A
hydrometer
B
anemometer
C
rain guage
D
hygrometer
Explanation.
Relative humidity is the measurement of the amount of moisture in the air and is determined by using a wet and dry bulb hygrometer (D).

Correct Option:
D
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Question 4
A
Mosses
B
Ferns
C
Lichens
D
Grasses
Explanation.
Lichen is as a result of symbiosis relationship association between fungi and algae plant. It is the first stage of ecological succession. Lichen is the simplest of the options. (C).

Correct Option:
C
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Question 5
A
hydrophytes
B
epiphytes
C
halophytes
D
xerophytes
Explanation.
Hydrophytes or aquatics live in fresh water and show a number of adaptation to their environment. Xerophytes are plants which can survive in place where water supply is limited. Epiphytes are involved in commensalism. Halophytes means plant in halides environment that is contain salts of chloride (C).

Correct Option:
C
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Question 6
A
cercaria
B
bladder worm
C
miracidium
D
Egg
Explanation.
Miracidium larvae emerges and bores into foot of small Redia forms further larvae by internal propagation. Cercavia escapes from snail through pulmonary aperture. Encysted cercaria adheres to blade of grass in wet pasture land and get into man. (A).

Correct Option:
A
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Question 7
A

inspiration

B

excretion

C

secretion

D

digestion

Explanation.

Malphigian tubule is the excretory organ in insect (B).


Correct Option:
B
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Question 8
A
hepati portal vein
B
pulmonary vein
C
renal vein
D
renal artery
Explanation.
The blood is transported to the Kidney through the artery and leaves the Kidney through Renal vein (C).

Correct Option:
C
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Question 9
A
Concentrate
B
Annelid
C
Playhelmintie
D
Arachinida
Explanation.
Flatworms are platyhelmintlies (C).

Correct Option:
C
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Question 10
A
sexual underdevelopment
B
cretinism
C
gigantism
D
diabetes mellitus
Explanation.
Thyroxine is complex compounds which include iodine. An animal not producing enough becomes slow, may not grow to its proper size (cretinism) (B).

Correct Option:
B

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