What characters are used in natural system of classification? Explain with examples.

3

(a)

Describe the type of photosynthetic pigment in red algae,green algae and brown algae.

3

(a)

Write a brief account of mosses.

3

(a)

What is the habitat of ferns. Describe their plant body. Explain the nature of spores ferns have. List out some common ferns.

3

(a)

What is the advantage of the development of seed habits in seed plants?

3

(a)

Explain the nature of sporophylls in pteridophytes.

3

(a)

What was the disadvantage of the artifical system of classification?

3

(a)

What is the general structure of Pteridophytes?

3

(a)

What are the differences between pinus and cycas?

3

(a)

Explain some external features of dicotyledons.

3

(a)

Explain some external features of monocotyledons.

3

(a)

What are the differences beween dicots and monacots?

3

(a)

What is the economic importance of moss?

3

(a)

What are the industrial uses of algae?

3

(a)

Give three features that have lead to the dominance of vascular plants?

3

(a)