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• Biology

Biology 2011

Q. 1.   The "Eyes" of the potato tuber are

1. Axillary buds  
2. Root buds
3. Flower buds
4. Shoot buds

Sol:

Axillary buds developing at nodes/notch/eyes.

Answer: (1)

Q. 2. Organisms called Methanogens are most abundant in a

1. Hot spring     
2. Sulphur rock
3. Cattle yard
4. Polluted stream  

Sol:

Methanogens are archaebacteria abundant in cattle yard, and paddy fields.

Answer: (3)

Q. 3. Which one of the following have the highest number of species in nature?

1. Angiosperms    
2. Fungi
3. Insects     
4. Birds   

Sol:

The largest phylum in animal kingdom is arthropoda, and the largest class is insecta with 7,50,000 species.

Answer: (3)

Q. 4. Archegoniophore is present in

1. Funaria            
2. Marchantia
3. Chara   
4. Adiantum

Sol:

Stalk bearing archegonial cluster at tip in Marchantia thallus

Answer: (2)

Q. 5. Compared with the gametophytes of the bryophytes the gametophytes of vascular plants tend to be

1. Smaller and to have smaller sex organs
2. Smaller but to have larger sex organs
3. Larger but to have smaller sex organs
4. Larger and to haver larger sex organs

Sol:

Gametophytes are reduced and few celled in all vascular plants.

Answer: (1)