Biology · Textbook solutions

Plant Kingdom

Every solved example, exercise, and miscellaneous question, in the order the textbook teaches them. · 18 questions

Exercises

18 q

Ex 3 Q1 $What is the basis of classification of algae?$
Ex 3 Q2 $When and where does reduction division take place in the life cycle of a liverwort, a moss, a fern, a gymnosperm and an angiosperm?$
Ex 3 Q3 $Name three groups of plants that bear archegonia. Briefly describe the life cycle of any one of them.$
Ex 3 Q4 $Mention the ploidy of the following: protonemal cell of a moss; primary endosperm nucleus in dicot, leaf cell of a moss; prothallus cell of a ferm; gemma cell in Marchantia; meristem cell of monocot, ovum of a liverwort, and zygote of a fern.$
Ex 3 Q5 $Write a note on economic importance of algae and gymnosperms.$
Ex 3 Q6 $Both gymnosperms and angiosperms bear seeds, then why are they classified separately?$
Ex 3 Q7 $What is heterospory? Briefly comment on its significance. Give two examples.$
Explain briefly the following terms with suitable examples:-
Ex 3 Q8 (i) $protonema$
Ex 3 Q8 (ii) $antheridium$
Ex 3 Q8 (iii) $archegonium$
Ex 3 Q8 (iv) $diplontic$
Ex 3 Q8 (v) $sporophyll$
Ex 3 Q8 (vi) $isogamy$
Differentiate between the following:-
Ex 3 Q9 (i) $red algae and brown algae$
Ex 3 Q9 (ii) $liverworts and moss$
Ex 3 Q9 (iii) $homosporous and heterosporous pteridophyte$
Ex 3 Q10 $Match the following (column I with column II) Column I Column II (a) Chlamydomonas (i) Moss (b) Cycas (ii) Pteridophyte (c) Selaginella (iii) Algae (d) Sphagnum (iv) Gymnosperm$
Ex 3 Q11 $Describe the important characteristics of gymnosperms.$