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Question 31
A
Malleus, incus and stepes  
B
Malleu, stepes and incus  
C
Stepes, incus and malleus  
D
Stepes, malleus and incuse 
Explanation.
Share Answer The middle ear consists of the eardrum (tympanium) and three small bones called ossicles which are malleus (Hammer), incus (anvil)and stapes (stirrup)in that order, that function in transmitting vibration. Stapes then link up with fenestral ovalis (A).

Correct Option:
A


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Question 33
A
Plasma membrane  
B
Vaccine membrane  
C
Nuclear membrane  
D
Golgi body membrane 
Explanation.
Share Answer Golgi body is a stack of flat, membrane — bounded sacs. These protein filled sacs migrate to the surface of the cell and discharge their contents to the outside (D).

Correct Option:
D

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Question 34
A
Sporophytes  
B
Gametophyte  
C
Hetaphyte  
D
Cimatiophyte 
Explanation.
Share Answer In moss plant, which exhibits alternation of generation. The sexual organ is called haploid gametophyte and asexual organ called diploid sporotophte. (A).

Correct Option:
A

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Question 35
A
Xylem parenchyma  
B
Secondary phloem  
C
Endodermis  
D
Cambium 
Explanation.
Share Answer In the dicotyledon roots and stems, cambium exist between the xylem and the phloem. They are capable of living and multiplying thereby xylem and phloem. This then results in the growth in width or growth of the stem called secondary thickening (D).

Correct Option:
D

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Question 36
A
Constriction  
B
Vasodilation  
C
sweating  
D
excretion 
Explanation.
Share Answer The mechanism is to increase the rate of heat loss to the environment during dry season (B).

Correct Option:
B

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Question 37
A
Sunlight  
B
Chlorophyll  
C
carbon dioxide  
D
Water. 
Explanation.
Share Answer 2H2O —> 4H+ + 4OH 4OH- + Chlorophyll —> 2H2O + O2 + Energy (D).

Correct Option:
D

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Question 38
A
Liver  
B
Kidney  
C
Pancreas  
D
Spleen 
Explanation.
Share Answer Kidney is an excreting organ and acts as osmo-regulators. Liver is a large organ lying under the diaphragm. One of the important functions of the liver is to regulate the amounts of substances passed into the general circulation. Excess sugars are temporarily stored in the liver as animal starch or glycogen (A).

Correct Option:
A

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Question 39
A
2:1  
B
1:2:1  
C
3:1  
D
1:2 
Explanation.
Share Answer
Correct Option:
C

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Question 40
A
Splitting of glucose in the presence of oxygen  
B
Fermentation of starch  
C
Splitting of glucose in the absence of oxygen  
D
Formation of carbon dioxide and water from glucose 
Explanation.
Share Answer In the first stage of respiration, sugar is broken down, step by step, to pyruvic acid, a compound containing three carbon atoms. This sequence of reaction is known as glycolysis (A).

Correct Option:
A

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