Receptors for hearing come under heading of_____.

1. 1. Chemical
   2. Photo
   3. Nociceptors
   4. Mechanical

Which of the following secrete hydrochloric acid in stomach?

1. 1. Oxyntic
   2. Mucosa
   3. Goblet
   4. Epithelial

Outer surface of bones is covered by a dense layer of connective tissue, called as _____.

1. 1. Woven bone
   2. Periosteum
   3. Epithelium lining
   4. Connective lining

Which of the following is a selectively permeable membrane?

1. 1. cell membrane
   2. cell wall
   3. cytoplasm
   4. All of these

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