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.
What plants are heterosporous?
A heterosporous life history occurs in some pteridophytes and in all seed plants. It is characterized by morphologically dissimilar spores produced from two types of sporangia: microspores, or male spores, and megaspores (macrospores), or female spores.
What ferns are Homosporous?
ferns. Most ferns are homosporous, each plant having spores of one shape and size, usually 30 to 50 micrometres in length or diameter, although some reach more than 100 micrometres. A few fern families, however, have dimorphic spores, small ones (microspores) and large ones (megaspores).
Are bryophytes Homosporous or heterosporous?
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.
Are Fern Homosporous?
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. … The spores germinate into tiny gametophytes.
Are cycads heterosporous?
Cycads, like all seed plants, are also heterosporous, unlike the ferns which are all homosporous. Cycad cones are unisexual, in fact the plants producing them are dioecious, having separate male and female plants.
Which is heterosporous Fern?
Heterosporous water ferns (Marsileaceae and Salviniaceae) are the only extant group of plants to have evolved heterospory since the Paleozoic. These ferns possess unusual reproductive structures traditionally termed ”sporocarps.
Which plants are Homosporous?
The homosporous pteridophytes are the whisk ferns, Psilotum and Tmesipteris (Psilotophyta); the lycopods, Lycopodium sensu lato and Phylloglossum (class Aglossopsida of the Microphyllophyta); the horsetails and scouring rushes, Equisetum (Arthrophyta); and most families of ferns (Pteridophyta).
Which is the heterosporous?
Heterospory is the production of spores of two different sizes and sexes by the sporophytes of land plants. The smaller of these, the microspore, is male and the larger megaspore is female. … This occurred as part of the process of evolution of the timing of sex differentiation.
Which of the following is Homosporous?
Genera like Selaginella and Salvinia which produce two kinds of spores, macro (large) and micro (small) spores, are known as heterosporous pteridophytes Lycopodium and Equisetum are homosporous pteridophytes.
What is the difference between H * * * * * * * * * * and heterosporous?
Plants that are homosporous produce spores of the same size and also type. Heterosporous plants produce spores of two different sizes which are the larger spore called the megaspore, functioning as a female spore and the smaller spore known as the microspore that functions as a male spore.
Which of the following is heterosporous?
Selaginella, Salvinia, Marsilea and Azolla are heterosporous pteridophytes. Salvia is a heterosporous angiosperm. … Question : Which of the following are heterosporous pteridophytes ?
| Question | Which of the following are heterosporous pteridophytes ? |
|---|---|
| Chapter Name | Plant Kingdom |
| Subject | Biology (more Questions) |
| Class | 11th |
| Type of Answer | Text |
Are horsetails heterosporous or Homosporous?
LAND PLANTS The plants are heterosporous or homosporous with terminal, mostly abaxial sporangia, born on peltate, scaly sporophylls that are arranged in terminal, ellipsoid cones. The only extant genus, Equisetum (Equisetaceae) is herbaceous and homosporous.
Are conifers heterosporous?
Conifers are heterosporous, generating two different types of spores: male microspores and female megaspores. These spores develop on separate male and female sporophylls on separate male and female cones. In the male cones, microspores are produced from microsporocytes by meiosis.
Are ferns seedless vascular plants?
Ferns, club mosses, horsetails, and whisk ferns are seedless vascular plants that reproduce with spores and are found in moist environments.
What is Homosporous?
homosporous. / (hɒˈmɒspərəs, ˌhəʊməʊˈspɔːrəs) / adjective. (of most ferns and some other spore-bearing plants) producing spores of one kind only, which develop into hermaphrodite gametophytesCompare heterosporous.
How do you tell if a plant is Homosporous or Heterosporous?
Why bryophytes are Homosporous?
Homosporous is a condition in which identical spores, the same sized spores are produced. Such morphologically identical spores grow into bisexual gametophytes in some of the members (monoecious plants). Hence, in the homosporous condition, all spores would be of the same type.
Is Pinus Homosporous or heterosporous?
In pteridophytes, majority of plants are homosporous (producing similar kind of spores) e.g., Lycopodium. However, plants of genera like Selaginella and Salvinia are heterosporous (producing macro and micro spores). Pinus and Cycas, which are gymnosperms, are also heterosporous.
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.
Is selaginella Homosporous or heterosporous?
Lycopodium is homosporous–all spores are roughly equal in size. Selaginella and Isoetes are heterosporous–spores are of two distinct sizes, microspores and megaspores.
Which one of the following is example of heterosporous Fern?
Complete Answer: Selaginella and Salvinia are two examples of heterosporous pteridophytes.
Which is not a heterosporous Fern?
Gymnosperms are heterosporous. ..so pinus and cycas can be the answer. so only option left is c… pteridium. Dryopteris produces only one kind of spores (homosporous).
Which of the following plants is not heterosporous?
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. Option A is the correct answer.
Do ferns have seeds?
Ferns generally reproduce by producing spores. … However, unlike flowering plants, ferns do not have flowers or seeds; instead, they usually reproduce sexually by tiny spores or sometimes can reproduce vegetatively, as exemplified by the walking fern.
What is a fern gametophyte?
The fern gametophyte is a small plant that exists as a prolonged intermediate in the fern life cycle, between the germination of a spore and the mature sporophyte. Following its emergence from a spore, it grows from two cells into a distinctively shaped structure containing several hundred cells.
Are fern gametophytes unisexual?
Gametophyte: In ferns (and other homosporous vascular plants), a multicellular, independent organism that usually produces sperm- and egg-forming gametangia (antheridia and archegonia respectively): can be unisexual or bisexual (hermaphroditic).
Is Moss a sporophyte?
A moss is a flowerless, spore-producing plant – with the spores produced in small capsules. … The spore capsule, often with a supporting stalk (called a seta), is the sporophyte and this grows from the gametophyte stage.
Is Pinus heterosporous plant?
Pinus is a monoecious gymnosperm having both male and female cones on the same plant and male and female strobilus are borne on separate strobili. … They are heterosporous plants, which means they produce two different types of spores.
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.
Graduated from ENSAT (national agronomic school of Toulouse) in plant sciences in 2018, I pursued a CIFRE doctorate under contract with Sun’Agri and INRAE in Avignon between 2019 and 2022. My thesis aimed to study dynamic agrivoltaic systems, in my case in arboriculture. I love to write and share science related Stuff Here on my Website. I am currently continuing at Sun’Agri as an R&D engineer.