What are seed located in gymnosperm?

1

(a)

Seed lie naked or  exposed on the surface of megasporophyll

What does natural system of classification indicates?

1

(a)

It indicates the possible origin of diffferent organisms.

How are plants placed in phylogenetic system of classification?

1

(a)

Flowering plants are placed in ascending series related to their complexity of floral morphology

Which unicellular plants are included in kingdom-plantae?  

1

(a)

Kingdom - Plantae includes unicellular members of green algae e.g., Chlamydomonas Chlorella

How are algae classified in Whittaker's classification? 

1

(a)

  In Whittaker's classification algae are grouped in three Kingdoms
  (i) Monera (blue- green algae)
  (ii) Protista (dinoflagellates, diatoms, euglenoids)
  (iii) Plantae (red algae, brown algae, and green algae)

What is Kingdom - Plantae?

2

(a)

Write one feature each of liveworts and mosses.

2

(a)

Which pteridophyte are useful in nitrogen-fixation and how?

2

(a)

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

3

(a)

Write a brief account of mosses.

3

(a)

Why the vascular plants dominated land?

3

(a)

Why is Ginkgo Biloba called a living fossil? Explain how is it useful for horticulturists. What are its important features? Why horticulturists prefer to grow only male plants?

5

(a)

Name three groups of plants that bear archegonia. Briefly describe the life cycle of any one of them.

5

(a)