Read the following four statements (A-D):

How many of the above statements are right?

1.  Three 

2.  Four 

3.  One 

4.  Two 

How many organisms in the list given below are autotrophs?
Lactobacillus,  Nostoc,  Chara,  Nitrosomonas,  Nitrobacter,  Streptomyces, Sacharomyces, Trypanosoma, Porphyra,  Wolfia
1.  Five
2.  Six
3. Three
4.  Four 

How many plants in the list given below have marginal placentation?
Mustard,  Gram,  Tulip,  Asparagus, Arhar, Sun hemp, Chilli, Colchicine, Onion, Moong, Pea, Tobacco, Lupin

1.  Five 

2.  Six 

3.  Three 

4.  Four 

Compared to a dicot root, a monocot root has: 

1. Many xylem bundles 

2. Inconspicuous annual rings 

3. Relatively thicker periderm 

4. More abundant secondary xylem 

A test cross is carried out to:

Which one of the following categories of animals, is correctly described with no single exception in it?

The rate of formation of new organic matter by rabbits in grassland is called: 

1. Secondary productivity 

2. Net primary productivity 

3. Gross primary productivity 

4. Net productivity 

In genetic engineering, the antibiotic-resistance gene is used:
1.  To select healthy vectors
2.  As sequences from where replication starts
3.  To keep the cultures free of infection
4.  As selectable markers

The secretory phase in the human menstrual cycle is also called:
1. Follicular phase lasting for about 6 days
2. Luteal phase and lasts for about 13 days
3. Follicular phase and lasts for about 13 days
4. Luteal phase and lasts for about 6 days

In gobar gas, the maximum amount is that of:

1.  Methane 

2.  Propane 

3.  Carbon dioxide 

4.  Butane