Basis of Classification and Algae, Bryophytes and Pteridophytes

Draw labelled diagrams of

b. Gametophyte and sporophyte of Funaria.

Draw labelled diagrams of

a. Female and male thallus of a liverwort.

Lichen is usually cited as an example of ‘symbiosis’ in plants where an algal and a fungal species live together for their mutual benefit. Which of the following will happen if algal and fungal partners are separated from each other?
a. Both will survive and grow normally and independent from each other.

b. Both will die.

c. Algal component will survive while the fungal component will die.

d. Fungal component will survive while algal partner will die.

Based on your answer how do you justify this association as symbiosis

With the help of a schematic diagram describe the haplo-diplontic life cycle pattern of a plant group.

Gametophyte is a dominant phase in the life cycle of a bryophyte. Explain.

How are the male and female gametophytes of pteridophytes and gymnosperms different from each other?

Comment on the lifecycle and nature of a fern prothallus.

The heterosporous pteridophytes show certain characteristics, which are precursor to the seed habit in gymnosperms. Explain.

Each plant or group of plants has some phylogenetic significance in relation to evolution: Cycas, one of the few living members of gymnosperms is called as the 'relic of past'. Can you establish a phylogenetic relationship of Cycas with any other group of plants that justifies the above statement?

How far does Selaginella one of the few living members of Lycopodiales (pteridophytes) fall short of seed habit.

Heterospory i.e., formation of two types of spores - microspores and megaspores is a characteristic feature in the life cycle of a few members of pteridophytes and all spermatophytes. Do you think heterospory has some evolutionary significance in plant kingdom?

The male and female reproductive organs of several pteridophytes and gymnosperms are comparable to floral structures of angiosperms. Make an attempt to compare the various reproductive parts of pteridophytes and gymnosperms with reproductive structures of angiosperms.

Why are bryophytes called the amphibians of the plant kingdom?

The plant body in higher plants is well differentiated and well developed. Roots are the organs used for the purpose of absorption. What is the equivalent of roots in the less developed lower plants?

Food is stored as Floridean starch in Rhodophyceae. Mannitol is the reserve food material of which group of algae?

Protonema is

A Prothallus is

A plant shows thallus level of organization. It shows rhizoids and is haploid. It needs water to complete its life cycle because the male gametes are motile. Identify the group to which it belongs to

Holdfast, stipe and frond constitutes the plant body in case of

Fusion of two motile gametes which are dissimilar in size is termed as