What is the difference between heterospory and Homospory?
The key difference between homospory and heterospory is that homospory is the production of spores of the same size and same type, while heterospory is the production of spores of two different sizes and different sexes. Homospory refers to the production of morphologically identical spores.
What is meant by Homospory and heterospory What are the contrasting features of the gametophytes produced by Homosporous and heterosporous plants?
Homospory is the production of a single type of spores. It occurs in seedless, vascular plants. The homospore germinates to produce a bisexual gametophyte. On the other hand, heterospory is the production of two types of spores different in size as well as in sex.
What are the contrasting features of the gametophytes produced by Homosporous and heterosporous plants?
Homosporous plants produce one type of spore which develops into a gametophyte (1n) with both male and female organs. Heterosporous plants produce separate male and female gametophytes, which produce sperm and eggs, respectively.
What’s the difference between microspores and megaspores?
Microspores are spores that are specifically male and give rise to male gametophytes; megaspores, on the other hand, are specifically female and give rise to female gametophytes. The fluctuation between the diploid (sporophyte) and haploid (gametophyte) life stages that occurs in plants.
What is Homospory example?
Definition of homospory : the production by various plants (such as the club mosses and horsetails) of asexual spores of only one kind.
What are the advantages of heterospory over Homospory?
Heterosporous condition has many Advantages over Homospory: The endosporic gametophytes are independent of the external harsh environmental conditions. Moreover, they have a continuous supply of food material from the diploid sporophytic plant.
What is a Homospory?
What is the advantage of heterospory over Homospory?
Are microspores and pollen the same thing?
The key difference between microspore and pollen grain is that microspore is the small spore that develops into the male gametophyte in plants while pollen grain is the small grain that contains the male gametophyte. Microspore and pollen grain are two structures that develop during these two generations.
What is a Megagametophyte?
Definition of megagametophyte : the female gametophyte produced by a megaspore.
What is Homospory?
Are mosses homosporous or heterosporous?
Mosses are heterosporous, which means they make two distinct types of spores; these develop into male and female gametophytes. How are club mosses different from mosses? Clubmosses, which belong to the family Lycopodiaceae, are vascular plants that do not have flowers and that reproduce sexually by means of spores (like mushrooms, ferns and true mosses).
Are bryophytes homosporous or heterosporous?
Yes, all bryophytes are homosporous (i.e., they produce only one type of spores) including Marchantia and Polytrichum. All bryophytes are homosporous and monoecious but Marchantia is an exception as it is dioecious. Are bryophytes always heterosporous? Bryophytes are not heterosporous. They are homosporous – which means they produce spore of only one kind.
Are all ferns 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). The gametophytes of ferns….
What is the result of heterospory?
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. Heterospory evolved during the Devonian period from isospory independently in several plant groups: the clubmosses, the arborescent horsetails, and progymnosperms. This occurred as part of the process of