Match the following and select the correct option: 

	Column I		Column II
(a)	Earthworm	(i)	Pioneer species
(b)	Succession	(ii)	Detrivore
(c)	Ecosystem service	(iii)	Natality
(d)	Population growth	(iv)	Pollination

1. A-(i), B-(ii), C-(iii), D-(iv)

2. A-(i), B-(ii), C-(iii), D-(iv)

3. A-(iii), B-(ii), C-(iv), D-(i)

4. A-(ii), B-(i), C-(iv), D-(iii)

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