2. Which one of the following organisms can serve as a biofertilizer for rice crop?

1. 1. Rhizobium sp.
   2. Blue-green algae
   3. Mycorrhizal fungi
   4. None of these

The productivity of aquatic ecosystem is basically determined by light and_____.

1. 1. CO2
   2. Nutrients
   3. O2
   4. Water

Photosystem II has molecules which absorbs maximum light of_____.

1. 1. 900 m
   2. 800 nm
   3. 700 nm
   4. 680 nm

The sequence of 3 bases on tRNA which is complementary to condon of mRNA is called_____.

1. 1. Code
   2. Gene
   3. Anticodon
   4. Codon

Which chemical component has the same % in bacterial as well as the mammalian cell_____.

1. 1. Water
   2. Carbohydrate
   3. Proteins
   4. Lipids

The uptake of water in plants involves_____.

1. 1. Passive transport
   2. Active transport
   3. A & B
   4. All of these

Hemoglobin is dissolved in the blood of_____.

1. 1. Hydra
   2. Cockroach
   3. Earthworm
   4. Sponges

When abdomen expands, the number of spiracles open is_____.

1. 1. 6
   2. 8
   3. 10
   4. 12

Joints between flat bones of skull are termed as_____.

1. 1. Sutural joints
   2. Suture
   3. Both A and B
   4. Syndesmosis

Insulin and glucagons are _____in nature.

1. 1. Amino acid derivative
   2. Protein
   3. Steroid
   4. Polypeptide