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Biology 2011

  

Q. 89. Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three  are correct?

1. It is upright in shape
2. Its base is broad
3. It shows energy content of different trophic level organisms
4. It is inverted in shape

Sol:

It is never inverted.

Answer: (4)

Q. 90. Ethanol is commercially produced through a particular species of

1. Aspergillus
2. Aspergillus
3. Clostridium
4. Trichoderma

Sol:

Yeast species.

Answer: (2)

 

Q. 91.   Consider the following four conditions (a - d) and select the correct pair of them as adaptation to environment in desert lizards. 

The conditions

(a) Burrowing in soil to escape high temperature

(b) Losing heat rapidly from the body during high temperature

(c) Bask in sun when temperature is low

(d) Insulating body due to thick fatty dermis

1. (a), (b)   
2. (c), (d)
3. (a), (c)
4. (b), (d)

Sol:

The adaptations in desert lizard are

(i) burrowing in soil to escape high temperature

(ii) bask in sun when temperature is low

Answer: (3)

 

Q. 92. Which one of the following pairs of gases are the major cause of "Greenhouse Effect"?

1. CO₂ and N₂O
2. CO₂ and O₃
3. CO₂ and CO
4. CFCs and SO₂

Sol:

CO₂, CH₄, N₂O and CFC are common green house gases.

Answer: (1)

 

Q. 93.   Where will you look for the sporozoites of the malarial parasite?

1. Salivary glands of freshly moulted female Anopheles mosquito
2. Saliva of infected female Anophelesmosquito
3. Red blood corpuscles of humans suffering from malaria
4. Spleen of infected humans

Sol:

Sporozoites are the infective stage of malarial parasite. They present in the saliva of infected female Anophelesmosquito.

Answer: (2)