Give the answers of the ques
Of class 9
Answers
Q 3 Ans :-
Pteridophyta Characteristics
Pteridophytes are the first true land plants: ...
They are seedless, vascular cryptogams: ...
They show true alternation of generations: ...
Sporophyte has true roots, stem and leaves: ...
Spores developed in sporangia are homosporous or heterosporous: ...
Sporangia are produced in groups on
sporophylls:
Q 4 Ans:-
Angiosperms, also called flowering plants, have seeds that are enclosed within an ovary (usually a fruit), while gymnosperms have no flowers or fruits, and have unenclosed or “naked” seeds on the surface of scales or leaves. Gymnosperm seeds are often configured as cones.
example:
Examples of angiosperms are monocots like lilies, orchids, agaves (known for agave nectar) and grasses; and dicots like roses, peas, sunflowers, oaks and maples. Gymnosperm examples include non-flowering evergreen trees such as pine, spruce and fir.
Answer:
gymnosperm have neked seed where as angiosperms have covered seed
gymnosperm have reproduction externally whereas angiosperms have it internally
gymnosperm - example I guess it's fir but I am not sure
angiosperms - hibiscus, mango