Question

Which is microphyllus plant _ (a) liverwort (b) Cycas (c) ferns (d) selaginella ?​

Answer 1

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❥Which is microphyllus plant _

(a) liverwort

(b) Cycas

(c) ferns

(d) selaginella

Figure A shows Selaginella.

It belongs to pteridophytes which are the first terrestrial plants to possess vascular tissues – xylem and phloem.

• It belongs to the Lycopsida class of pteridophytes.
• Leaves of Selaginella are small and known as microphylls.
• Sporophylls are compactly arranged into structures called strobili or cones.
• It is a heterosporous plant as it produces two kinds of spores.

Figure B shows Equisetum.

• It belongs to pteridophytes which are the first terrestrial plants to possess vascular tissues – xylem and phloem.
• It belongs to the Sphenopsida class of pteridophytes.
• Sporophylls are compactly arranged into structures called strobili or cones.

Figure C shows Salvinia.

• It is an aquatic fern. It also belongs to pteridophytes.
• It is also a heterosporous plant as it produces two kinds of spores –
• macro (large) and micro (small) spores.

Figure D shows Ginkgo.

It belongs to gymnosperms which are plants in which the seeds are not enclosed within the fruit wall,

• they bear naked seeds.
• Ginkgo is also called a living fossil.
• It is a connecting link between cycades and conifers.

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