A species facing extremely high risk of extinction in the immediate future is called:

1. Vulnerable

2. Endemic

3. Critically Endangered

4. Extinct

The zone of atmosphere in which the ozone layer is present is called:

1. Ionosphere

2. Mesosphere

3. Stratosphere

4. Troposphere

The organisation which publishes the Red List of species is:

Select the Taxon mentioned that represents both marine and freshwater species:

1. Echinoderms

2. Ctenophora

3. Cephalochordata

4. Cnidaria

Which one of the following living organisms completely lacks a cell wall?

1. Cyanobacteria

2. Sea- fan (Gorgonia)

3. Saccharomyces

4. Coelenterata algae

Planaria possess a high capacity of:

1. metamorphosis

2. regeneration

3. alternation of generation

4. bioluminescence

A marine cartilaginous fish that can produce electric current is:

1. Pristis

2. Torpedo

3. Trygon

4. Scoliodon 

Choose the correctly matched pair:

1. Tendon-Specialized connective tissue

2. Adipose tissue-Dense connective tissue

3. Areolar tissue- Loose connective tissue

4. Cartilage- Loose connective tissue

Choose the correctly matched pair:

1. Inner lining of salivary ducts- Ciliated epithelium

2. Moist surface of buccal cavity- Glandular epithelium

3. Tubular parts of nephrons- Cuboidal epithelium

4. Inner surface of bronchioles- Squamous epithelium

In the 'S' phase of the cell cycle:

1. amount of DNA doubles in each cell.

2. amount of DNA remains the same in each cell

3. chromosome number is increased

4. amount of DNA is reduced to half in each cell.