Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?
Hydrilla
Yucca
Viola
Banana
B.
Yucca
Yucca has an obligate mutualism with a species of moth i.e. pronuba. In Obligate mutualism, one organism cannot survive without other.
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?
Name three groups of plants that bear archegonia. Briefly describe the life cycle of any one of them.
Mention the ploidy of the following: protonemal cell of a moss; primary endosperm nucleus in dicot, leaf cell of a moss; prothallus cell of a ferm; gemma cell in Marchantia; meristem cell of monocot, ovum of a liverwort, and zygote of a fern.
Write a note on economic importance of algae and gymnosperms.
Both gymnosperms and angiosperms bear seeds, then why are they classified separately?
What is heterospory? Briefly comment on its significance. Give two examples.
Explain briefly the following terms with suitable examples:
(i) protonema
(ii) antheridium
(iii) archegonium
(iv) diplontic
(v) sporophyll
(vi) isogamy
Differentiate between the following:
Red algae and brown algae
Differentiate between the following:
liverworts and moss
Mock Test Series
