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1.
Which of the following does not contribute to the biomass in an ecosystem.
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A.
Producers
B.
Food chain
C.
Consumers
D.
Saprophytes
Explanation. Give a better 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 it’s not relevant in this context (D).


2.
Terrestrial animals which are capable of mintai fling constant body temperatures within fairly close limits are.
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A.
Thermocines
B.
Homotherms
C.
Poikilotherms d Sternotherms
Explanation. Give a better Explanation
Homiotherms (Greek: homois: similar) animals keep their body temperature more or less constant, regardless of their surrounding (B).


3.
The amount of moisture in the air (relative humidity) can be measured by
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A.
hydrometer
B.
anemometer
C.
rain guage
D.
hygrometer
Explanation. Give a better 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).


4.
Which of the following groups of plants would be the first colonies in an ecological succession on changing rocks to soil?
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A.
Mosses
B.
Ferns
C.
Lichens
D.
Grasses
Explanation. Give a better 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).


5.
Plants adapted to life is salty water are called
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A.
hydrophytes
B.
epiphytes
C.
halophytes
D.
xerophytes
Explanation. Give a better 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).


6.
The state in the life of bilharzias which infects man is the
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A.
cercaria
B.
bladder worm
C.
miracidium
D.
Egg
Explanation. Give a better 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).


7.

The malphigian tubule plays a major role in

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A.

inspiration

B.

excretion

C.

secretion

D.

digestion

Explanation. Give a better Explanation

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



8.
The filtered blood from the kidney is carried back to the circulatory system, through the
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A.
hepatiê portal vein
B.
pulmonary vein
C.
renal vein
D.
renal artery
Explanation. Give a better Explanation
The blood is transported to the Kidney through the artery and leaves the Kidney through Renal vein (C).


9.
Flatworms are classified as
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A.
Concentrate
B.
Annelid
C.
Playhelmintie
D.
Arachinida
Explanation. Give a better Explanation
Flatworms are platyhelmintlies (C).


10.
A severe deficiency of thyroxin result in
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A.
sexual underdevelopment
B.
cretinism
C.
gigantism
D.
diabetes mellitus
Explanation. Give a better Explanation
Thyroxine is complex compounds which include iodine. An animal not producing enough becomes slow, may not grow to its proper size (cretinism) (B).


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