The gametophyte generation is multicellular, haploid (n) very small in size, does not have conducting tissues and is dependent upon the sporophyte. The sporophytes of all gymnosperms are heterosporous since they produce two types of spores, namely the microspores and megaspores. The microspores are produced in structures, called microsporangia which are produced by modified fertile leaves called microsporophylls. The microsporophylls are compactly arranged in male cones or male strobili. In a microsporangium there are special diploid cells called microspores mother cells which undergo meiosis or reduction division to produce haploid microspores. Within the microspore, a reduced few celled male gametophyte generation develops. This entire structure is in the pollen grain which develops within the microsporangia. The megaspores are produced in megasporangia or ovules which are produced by modified fertile leaves called megasporophylls.
Which of the following statements is incorrect about gymnosperms?
NEET UG 2020 — Botany Plant Kingdom
Which of the following statements is incorrect about gymnosperms?
Held on 30 Apr 2020 · Verified 9 Jul 2026.
Options
- A
They are heterosporous
- B
Male and female gametophytes are free living
- C
Most of them have narrow leaves with thick cuticle
- D
Their seeds are not covered
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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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