How are the male and female gametophytes of pteridophytes and gymnosperms different from each other?
(N/A) $\rightarrow$ The male and female gametophytes of pteridophytes and gymnosperms differ in the following ways:
| Male gametophyte in Pteridophytes | Male gametophyte in Gymnosperms |
| $(i)$ Reduced and short-lived. | $(i)$ Highly reduced and dependent on the sporophyte. |
| $(ii)$ Male gametes are flagellated (motile). | $(ii)$ Male gametes are non-flagellated (non-motile). |
| $(iii)$ Requires water for fertilization. | $(iii)$ Does not require water; fertilization occurs via a pollen tube. |
| Female gametophyte in Pteridophytes | Female gametophyte in Gymnosperms |
| $(i)$ Often independent and photosynthetic. | $(i)$ Completely dependent on the parent sporophyte. |
| $(ii)$ Not retained within the parent sporophyte. | $(ii)$ Retained within the megasporangium (ovule). |
| $(iii)$ Does not form a seed. | $(iii)$ Develops into a seed after fertilization. |
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Into which group are the non-flowering plants (Cryptogams) divided?
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View SolutionSelect the correct option by matching the given groups $(i)$ red algae,$(ii)$ green algae,$(iii)$ bryophytes,and $(iv)$ Pteridophytes with their respective characteristics $(P, Q, R, S)$:
$(P)$ Their gametophyte is called prothallus.
$(Q)$ Rhizoids are present,but they are not true roots.
$(R)$ Pyrenoids contain protein besides starch.
$(S)$ Red pigment,$r$-phycoerythrin,is present in their body.
Match the groups $(i, ii, iii, iv)$ with the characteristics $(P, Q, R, S)$ and select the correct sequence.
$(P)$ Their gametophyte is called prothallus.
$(Q)$ Rhizoids are present,but they are not true roots.
$(R)$ Pyrenoids contain protein besides starch.
$(S)$ Red pigment,$r$-phycoerythrin,is present in their body.
Match the groups $(i, ii, iii, iv)$ with the characteristics $(P, Q, R, S)$ and select the correct sequence.
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(Plant Name) (Characteristic) $(1)$ Oscillatoria $(P)$ Thallus $(2)$ Cycas $(Q)$ Cell wall contains chitin mixed with cellulose $(3)$ Fern $(R)$ Primitive type of flowers $(4)$ Yeast $(S)$ Food stored as starch
| (Plant Name) | (Characteristic) |
| $(1)$ Oscillatoria | $(P)$ Thallus |
| $(2)$ Cycas | $(Q)$ Cell wall contains chitin mixed with cellulose |
| $(3)$ Fern | $(R)$ Primitive type of flowers |
| $(4)$ Yeast | $(S)$ Food stored as starch |
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View SolutionWhich of the following series is $NOT$ included in the sub-class $Thalamiflorae$?
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View SolutionWhich of the following plants are similar to amphibians in their requirement for water for fertilization?
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