Gymnosperms are also called soft wood spermatophytes because they lack
cambium
phloem fibres
thick-walled tracheids
xylem fibres
D.
xylem fibres
Gymnosperms lack xylem fibres. Large amount of parenchymatous cells are present with secondary xylem tracheids. So, these are also known as softwood spermatophytes.
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
Differentiate between the following:
homosporous and heterosporous pteridophyte
Differentiate between the following:
syngamy and triple fusion
How would you distinguish monocots from dicots?
Describe the important characteristics of gymnosperms.
Cyanobacteria are classified under
Mock Test Series
