Selaginella and Salvinia are heterosporous as they produce two kinds of spores-mirco (small) spores and macro (large) spores. The microspores and megaspores germinate and give rise to male and female gametophyte, respectively. The female gametophyte in these plants are retained on the parent sporophytes for variable periods. The development of the zygotes into young embryos takes place within the female gametophytes. This event is the precursor to the seed habit considered to an important step in evolution.
Selaginella and Salvinia are considered to represent a significant step towards evolution of seed habit because
NEET UG 2011 — Botany Plant Kingdom
Selaginella and Salvinia are considered to represent a significant step towards evolution of seed habit because
Held on 30 Apr 2011 · Verified 9 Jul 2026.
Options
- A
female gametophyte is free and gets dispersed like seeds
- B
female gametophyte lacks archegonia
- C
magaspores possess endosperm and embryo surrounded by seed coat
- D
embryo develops in female gametophyte which is retained on parent sporophyte
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The correct sequence of events in the life cycle of bryophytes is A. Fusion of antherozoid with egg. B. Attachment of gametophyte to substratum. C. Reduction division to produce haploid spores. D. Formation of sporophyte. E. Release of antherozoids into water. Choose the correct answer from the options given below :
In bryophytes, the gemmae help in which one of the following?
Which one of the following is the characteristic feature of gymnosperms?
Given below are the stages in the life cycle of pteridophytes. Arrange the following stages in the correct sequence. A. Prothallus stage B. Meiosis in spore mother cells C. Fertilisation D. Formation of archegonia and antheridia in gametophyte. E. Transfer of antherozoids to the archegonia in presence of water. Choose the correct answer from the options given below:
Match List-I with List-II. $\begin{array}{|l|l|l|l|}\hline & \text{List-I} & & \text{List-II} \\\hline \text{A}. & \text{Pteridophyte} & \text{(I)} & \text{Salvia} \\\hline \text{B.} & \text{Bryophyte} & \text{(II)} & \text{Ginkgo} \\\hline \text{C.} & \text{Angiosperm} & \text{(III)} & \text{Polytrichum} \\\hline \text{D.} & \text{Gymnosperm} & \text{(IV)} & \text{Salvinia} \\\hline\end{array}$ Choose the option with all correct matches.
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