Chlorophylls mainly absorb _____wavelengths?

1. 1. Orange – blue
   2. Violet – red
   3. Orange – re
   4. Yellow – orange

The maximum amount of oxygen which normal human blood absorbs and carries at sea level is _____per 100 ml of blood.

1. 1. 10 ml
   2. 15 ml
   3. 20 ml
   4. 25 ml

Any change in the environment of an organism is called_____.

1. 1. Stimulus
   2. Variation
   3. Response
   4. Reaction

Mastication is carried out by_____.

1. 1. Tongue
   2. Teeth
   3. Smooth muscles
   4. None of these

The branch of biology which deals with the study of social behavior and communal life of human beings living in any environment is called ?

1. 1. Human biology
   2. Social biology
   3. Both a and b
   4. Environmental biology

Which of the following vertebrates have a fish-like body?

1. 1. Reptiles
   2. Aves
   3. Mammals
   4. Amphibians

Monocots are characterized by_____.

1. 1. Number of sepals and petals are 2 or multiple of 2
   2. Number of sepals and petals are 4 or multiple of 4
   3. Number of sepals and petals are 5 or multiple of 5
   4. Number of sepals and petals are 3 or multiple of 3

Aerating openings formed in the bark through which exchange of gases takes place and water is lost in the form of vapours are_____.

1. 1. Lenticels
   2. Hydathods
   3. Stomata
   4. All of these

Which of the following does not show quaternary structure_____.

1. 1. Haemoglobin
   2. Pepsin
   3. Insulin
   4. Fibrin

Cell use _____to make proteins?

1. 1. RNA
   2. DNA
   3. Ribosomes
   4. Cytoplasm