3. Plant Kingdom

3. Plant Kingdom

23 Maths Exercise Solutions

What is the basis of classification of Algae

3.6 Plant Life Cycles and Alternation of Generations, Question No.1
What is the basis of classification of Algae

When and where does reduction division take place in the life cycle of a liverwort, a moss, a fern, a gymnosperm and an angiosperm?
3.6 Plant Life Cycles and Alternation of Generations, Question No.2
When and where does reduction division take place in the life cycle of a liverwort, a moss, a fern, a gymnosperm and an angiosperm?
Name three groups of plants that bear archegonia. Briefly describe the life cycle of any one of them.

3.6 Plant Life Cycles and Alternation of Generations, Question No.3
Name three groups of plants that bear archegonia. Briefly describe the life cycle of any one of them.

Mention the ploidy of the following:
a)protonemal cell of a moss
b)primary endosperm nucleus in dicot
c)leaf cell of a moss
d)prothallus cell of a fern
e)gemma cell in Marchantia
f)meristem cell of monocot
g)ovum of a liverwort
h)zygote of a fern
3.6 Plant Life Cycles and Alternation of Generations, Question No.4
Mention the ploidy of the following:
a)protonemal cell of a moss
b)primary endosperm nucleus in dicot
c)leaf cell of a moss
d)prothallus cell of a fern
e)gemma cell in Marchantia
f)meristem cell of monocot
g)ovum of a liverwort
h)zygote of a fern
Write a note on economic importance of algae and gymnosperms.

3.6 Plant Life Cycles and Alternation of Generations, Question No.5
Write a note on economic importance of algae and gymnosperms.

Both gymnosperms and angiosperms bear seeds, then why are they classified separately?

3.6 Plant Life Cycles and Alternation of Generations, Question No.6
Both gymnosperms and angiosperms bear seeds, then why are they classified separately?

What is heterospory? Briefly comment on its significance. Give two examples.

3.6 Plant Life Cycles and Alternation of Generations, Question No.7
What is heterospory? Briefly comment on its significance. Give two examples.

Explain briefly the following terms with suitable examples: -
Isogamy

3.6 Plant Life Cycles and Alternation of Generations, Question No.8
Explain briefly the following terms with suitable examples: -
Isogamy

Explain briefly the following terms with suitable examples: - 
Archegonium

3.6 Plant Life Cycles and Alternation of Generations, Question No.9
Explain briefly the following terms with suitable examples: - 
Archegonium

Explain briefly the following terms with suitable examples: -
sporophyll

3.6 Plant Life Cycles and Alternation of Generations, Question No.10
Explain briefly the following terms with suitable examples: -
sporophyll