Which one of the following is heterosporous?
William Jenkins (b) From the following Salvinia is heterosporous. Heterospory is the production of spores of two different sizes and two different developmental patterns. Small spores are called microspores and larger as Megaspore - Wikipedia
Which of the following are heterosporous?
Selaginella and Salvinia are heterosporous genera of pteridophytes. They produce two different types of spores - larger megaspores and smaller microspores.
What are examples of heterosporous?
Answer: Heterospory is the phenomenon of formation of two types of spores, i.e., smaller microspore and larger megaspore. Explanation: Examples of heterospory are Selaginella, Salvinia and Marsilea, etc.
Which plant is heterosporous?
Marsileaceae and Salviniaceae, is called heterospory. …all species of Selaginella are heterosporous; that is, they produce spores of two sizes, the larger designated as megaspores and the smaller as microspores. The megaspores develop into female gametophytes and the microspores into male gametophytes.
What is heterosporous condition give examples?
In the heterosporous, Spores germinate within sporangia and produce dependent gametophyte. 6. Examples of Homosporous pteridophytes are Lycopodium. Examples of Heterosporous pteridophytes are Selaginella and Salvinia.
NEET MCQ Which one of the following is heterosporous?
29 related questions foundWhat is meant by H * * * * * * * * * * and heterosporous pteridophytes give two examples?
⭐. HOMOSPOROUS PETRIDOPHYTES : The plants which produce only one kind of spores called homosporous pteridophytes. Ex: psilotum. ⭐.HETEROSPOROUS PTERIDOPHYTES : The plants which produce two kinds of spore on the same plant are these type. Ex : salvinia.
What is mean by H * * * * * * * * * * and heterosporous?
Homosporous means produces only one type of spores. Heterosporous means produces two types of spores. These types of pteridophytes are small in structure and cannot be separated by sex. These types of pteridophytes produce two types of spores and can be separated by sex.
What are heterosporous plants and give example?
Selaginella and Salvinia are two examples of heterosporous pteridophytes. These pteridophytes consist of two types of spores, large spores that germinate to produce female gametophyte and small spores germinate to produce male gametes.
Are ferns Homosporous or heterosporous?
Ferns are mostly homosporous, though some are heterosporous. The heterosporous state is a more advanced condition, that seems to have evolved independently in several groups of plants. The haploid spores are formed by meiosis inside the sporangium.
Is Cycas a heterosporous?
Cycas is a gymnosperm plant that belongs to the Cycadaceae family. ... They are heterosporous plants, which means they produce two different types of spores.
Which of the following are heterosporous Pteridophyte?
Heterosporous pteridophytes are Selaginella, Salvinia, Marsilea and Azolla.
Which of the following is an example of Pteridophyte?
Pteridophytes are vascular plants and have leaves (known as fronds), roots and sometimes true stems, and tree ferns have full trunks. Examples include ferns, horsetails and club-mosses.
Which of the following is Homosporous?
Selaginella and Salvinia are homosporous.
Is Salvinia Homosporous or heterosporous?
Option C: Selaginella and Salvinia are both heterosporous plants.
Which of the following is not heterosporous?
Complete answer:
Option A: Psilotum, Lycopodium, Pteris and Adiantum- these species of plants do not show heterospory and heterophily as they have single spores and they are homosporous.
Are mosses Homosporous?
Mosses are heterosporous, which means they make two distinct types of spores; these develop into male and female gametophytes. ... Ferns follow a pattern of development similar to that of mosses, although most (but not all) ferns are homosporous.
Are angiosperms Homosporous?
Pines, spruces, and firs are conifers. ... Gymnosperms, therefore, as exemplified by pine trees, are heterosporous. A major distinction we can make between seed plants (gymnosperms and angiosperms) and the non-seed plants (mosses and ferns) is that seed plants are heterosporous and non-seed plants are homosporous.
Are bryophytes Homosporous?
Homospory is frequently determined in all Bryophytes and most of the Pteridophytes or lower vascular plants. These plants have a different mechanism that prevents the fusion of male and lady gametes in the bisexual gametophyte. So bryophytes are homosporous.
Is Pinus Monoecious or dioecious?
- Pinus is a monoecious gymnosperm, having both male and female cones on the same plant and the male and female strobilus are borne on seperate strobili.
Are gymnosperms heterosporous?
Like all seed plants, gymnosperms are heterosporous. The sporangia that generate the male microspores and female megaspores are usually borne on separate cones. ... The pine life cycle is typical of gymnosperms, and is described in detail below.
Are angiosperms heterosporous?
As with gymnosperms, angiosperms are heterosporous. Therefore, they generate microspores, which will produce pollen grains as the male gametophytes, and megaspores, which will form an ovule that contains female gametophytes.
What is difference between H * * * * * * * * * * and heterosporous pteridophytes?
Homosporous pteridophytes are the vascular plants that produce only one type of spore. This spore contains both male and female parts. Heterosporous pteridophytes are the vascular plants that produce two types of spores, and thus the male and female parts can be distinguished.
What is heterosporous?
Heterospory is the production of spores of two different sizes and sexes by the sporophytes of land plants. ... This occurred as part of the process of evolution of the timing of sex differentiation.
What is meant by Microspore?
: any of the spores in heterosporous plants that give rise to male gametophytes and are generally smaller than the megaspore.
