Are bryophytes Homospory?
Furthermore, most seedless vascular plants and bryophytes are homosporous while all seed plants and some pteridophytes are heterosporous. Homospory and heterospory are two conditions of spore production.
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.
Are bryophytes spores Homosporous?
Yes, all bryophytes are homosporous (i.e., they produce only one type of spores) including Marchantia and Polytrichum.
Which plants are Homosporous?
A homosporous life history occurs in nearly all bryophytes and in most pteridophytes (lower vascular plants).
Are mosses heterosporous?
Mosses are heterosporous, which means they make two distinct types of spores; these develop into male and female gametophytes.
Are mosses Homosporous or heterosporous?
Mosses are both homosporous and heterosporous depending on the species of moss. In most cases, mosses are normally heterosporous that produce two different gametophytes. There are however some instances where they are homosporous that produce only one gametophyte that will be male or female.
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.
Do bryophytes have Heterospory?
Bryophytes are not heterosporous. They are homosporous – which means they produce spore of only one kind.
Are liverworts heterosporous?
LIVERWORTS. a cell or cells somewhere in its body in sporangia undergo meiosis to form spores. If is is homosporous the spores are of one type only. If it is heterosporous there are two types of spores microspores (“male”) and megaspores (“female”).
Can bryophytes be heterospory?
Are all mosses Homosporous or heterosporous?
Which bryophyte 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 are some examples of homosporous and heterosporus pteridophytes?
Examples of Homosporous pteridophytes are lycopodium, Equisetum, clubmoss and puzzlegrass. Examples of Heterosporous pteridophytes are Selaginella, Marselia and Salvinia. In both homosporous and Heterosporous pteridophytes, the gametes obtain the nutrition from the saprophyte.
What is the difference between male and female spores in bryophytes?
In anisosporous life histories, an unusual phenomenon in bryophytes, there is a size difference between spores produced in the same sporangium. Each meiotic division results in a tetrad of two small spores that produce male gametophytes and two larger spores that produce female gametophytes.
What is the difference between bryophytes and pteridophytes?
A Bryophytes are both homosporous and heterosporousB. Pteridophytes show sporic meiosisC. All algae – Brainly.in C. All algae form embryo but lack vascular tissues Read the above statements and select the correct one (s).
What is the difference between homosporous and heterosporic spore types?
The essential difference between the homosporous and heterosporous life history is the presence in the latter of two spore types (microspores and megaspores) and their concomitant precursory structures (microsporocytes and megasporocytes; microsporangia and megasporangia; etc.) and subsequent structures (microgametophytes and megagametophytes).