Biology N

                     1. Which one among the following vitamins is necessary for blood clotting?

(a)    Vitamin –A

(b)   Vitamin- D

(c)    Vitamin- k

(d)   Vitamin- C

                    2.  The fossil of Arxhaepteryx represents the evidence of origin of

(A)   Birds from reptiles

(B)   Mammals from reptiles

(C)   Reptiles from amphibians

(D)   Mammals from birds

                   3.  How do marine animals survive in water without air contact?

(a)    They do not require any oxygen

(b)    They take oxygen from water

(c)    They only produce oxygen in their body

(d)   They get oxygen from water plants

                   4. The macro nutrients provided inorganic fertilizers are

(a)    Carbon , iron and boron

(b)   Magnesium, manganese and sulphur

(c)    Magnesium, zinc and iron

(d)   Magnesium, phosphorus and potassium

                  5.  The ultimate cause of water movement in a plant stem against gravity is

(a)    Osmosis

(b)   Transpiration

(c)    Photosynthesis

(d)   Diffusion

                  6. Other that resistance to pests, what are the prospects for which genetically engineered plants have been created?

1.       To enable them to withstand drought.

2.       To increase the nutritive value of the produce.

3.       To enable them to grow and do photosynthesis in space ships and space stations.

IV. To increase their shelf life.

Select the correct answer using the codes given below

(a)    1  and 2

(b)   3 and 4

(c)    1, 2 and 4

(d)   All of these

              7. Mycorrhizal biotechnology has been used in rehabilitating degraded sites because mycorrhiza enables the plants to

1.       Resist drought and increase absorptive area.

2.       Tolerate extremes of ph.

3.       Resist disease infestation.

Select the correct answer using the codes given below.

(a)    Only 1

(b)   2 and 3

(c)    1  and 3

(d)   All of these

          8.  Which of the following leaf modifications occurs / occur in desert areas to inhibit water loss?

1.       Hard and waxy leaves.

2.       Tiny leaves or no leaves.

3.       Thorns instead of leaves.

Select the correct answer using the codes given below

(a)    1 and 2

(b)   Only 2

(c)    1 and 3

(d)   1, 2 and 3

           9. Which of the following statements is/ are correct?

1.       Viruses lack enzymes necessary for the generation of energy.

2.       Viruses can be cultured in any synthetic medium.

3.       Viruses are transmitted from one organism ot another by biological vectors only.

Select the correct answer using the codes given below

(a)    1 and 2

(b)   Only 2

(c)    1 and 3

(d)   All of these

10. Consider the following animals

1.       Sea cow

2.       Sea horse

3.       Sea lion

Which of the above is/ are mammal/ mammals?

(a)    1  and 2

(b)   Only 2

(c)    1 and 3

(d)   All of these

11. Which one among the following statements about blood transfusion is correct?

(a)    Blood group B can receive from group AB

(b)   Blood groups B and AB can receive from group B

(c)    Blood groups B and AB can receive from Group A

(d)   Blood group o can receive from group B

Answer:

1.       C

2.       C

3.       A

4.       B

5.       B

6.       C

7.       D

8.       A

9.       B

10.   D

11.   B