Identify the labelled part in the given figure and select the correct option.

	A	B
1.	Heterocyst	Mucilaginous sheath
2.	Mucilaginous sheath	Heterocyst
3.	Heterocyst	Capsid
4.	Pseudopodia	Mucilaginous sheath

'Red tide' is caused by

(1) Gonyaulax

(2) Ceratium

(3) Triceratium

(4) All of these

The common characteristic showning by mushroom, smut and rust

(1) is characterised by presence of basidiocarps

(2) is characterised by presence of ascocarps

(3) all are pathogen

(4) all are saprophytic in nature

Protists obtain their food as

(1) photosynthesizers only

(2) chemosynthesizers

(3) heterotrophs only

(4) Both (1) and (3)

Diatoms do not decay easily because

1. they have siliceous walls

2. their body is impervious to water

3. they are chitinous

4. they are abundant in saline soil

Plant decomposers are

(1) Monera and Fungi

(2) Fungi and Plantae

(3) Protista and Animalia

(4) Animalia and Monera

1. The biological classification was attempted instinctively
a. to make scientific studies easy
b. to use organisms for our own use
c. to make better understanding of the research running in all over the world
d. to make connection between living and non-living

The first attempt for Biological classification was because of the need to use organisms for our own use. Here which kind of uses are considered?

First time the scientific basis for classification was attempted by -

Which of the following statement is not incorrect with respect to biological classification attempted by Aristotle?