Is selaginella Monoecious or dioecious?
The gametophytes produced in Selaginella are heterozygous containing microspores and megaspores as male and female gametophytes respectively. Thus, Selaginella produces dioecious gametophytes. So, the correct answer is ‘Dioecious’.
Is selaginella Heterosporous or Homosporous?
Lycopodium is homosporous–all spores are roughly equal in size. Selaginella and Isoetes are heterosporous–spores are of two distinct sizes, microspores and megaspores.
What is the sporophyte of a moss?
The sporophyte refers to the diploid generation of the moss. It remains attached to the gametophyte (the haploid mother), and is in fact, parasitic upon it.
What is the habitat of selaginella?
Habit and Habitat of Selaginella Selaginella is the only living genus of the order Selaginellales and is commonly known as ‘spike moss’ or ‘small club moss’. It is a large genus comprising of about 700 species distributed all over the world. Abundantly it is found growing in tropical rain forests.
Is selaginella a bryophyte?
Selaginella is the sole genus of vascular plants in the family Selaginellaceae, the spikemosses or lesser clubmosses….Selaginella.
| Spikemoss | |
|---|---|
| Clade: | Lycophytes |
| Class: | Lycopodiopsida |
| Order: | Selaginellales Prantl |
| Family: | Selaginellaceae Willk. |
Are marchantia Monoecious or dioecious?
The liverwort Marchantia is strictly dioecious. Noll showed in 1907 that the spores consist of two classes, those which grow into male plants and those which grow into female plants. Both types of spores are produced in the same sporangium.
Is Selaginella a Homosporous Pteridophyte?
Option C: Selaginella and Salvinia are both heterosporous plants. Option D: Lycopodium and Equisetum are both homosporous pteridophytes plants. Therefore, this is the correct option.
Which of the following is Homosporous Selaginella?
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.
Is Selaginella a moss?
spike moss, (family Selaginellaceae), family of more than 700 species of mossy or fernlike seedless vascular plants of the order Selaginellales. The family consists of a single genus, Selaginella.
Is Selaginella club moss?
Club moss, scientifically known as Selaginella kraussiana, belongs to the Lycopodiaceae family of vascular plants. Selaginella is made up of over 300 different types of species but this article will cover the Kraussiana species. Kraussiana is commonly referred to as club moss because of its unique branching style.
What kind of moss is found in Selaginella?
Selaginella deflexa, small club moss. A 3-lobed megasporangium is clearly visible inside the bend in the fertile axis. The smooth, unlobed sporangia are microsporangia.
Where are microsporophylls found in a Selaginella patula?
Microsporophyll and Megasporophyll are aggregated in strobilli and cones at the apex of the stem or lateral branches. in Selaginella patula produces shoot with sporophyll and folliage leaves in alternate zone along the stems. Sporophylls may born in different srobilli.
Where are Selaginella plants found in the world?
Some species of Selaginella are found to grow in temperate regions but majority of them are found to occur in the rain forests of tropical countries. The species of Selaginella is found to grow on the ground, on damp, shaded and humid conditions.
What kind of rhizophore does a Selaginella have?
Besides, some species also have rhizophore (Fig.7.46A). Hieronymus (1902) divided the genus Selaginella into two sub-genera viz., Homoeophyllum and Heterophyllum on the basis of general structure of the plant body (Table 7.4). The stem is generally erect and radially constructed in the subgenus Homoeophyllum.