Why must mosses and ferns live in environments that are wet during at least part of the year?
Bryophytes also need a moist environment to reproduce. Their flagellated sperm must swim through water to reach the egg. So mosses and liverworts are restricted to moist habitats. But mosses are surprisingly resistant to drying up, and can survive under very harsh conditions.
Why do ferns and mosses need water?
Ferns have both roots and vascular tissue and therefore, can grow larger than moss species, but like the mosses, ferns require water for reproduction. The sperm cells have flagella and must swim through a water film to fertilize the egg.
How do both mosses and ferns disperse themselves to new locations?
Some fern spores drop into waterways where they are swept to a new place. Fern spores are hardy and can remain viable for up to four years, giving them plenty of time to find a suitable place to germinate. Mosses have flagellated sperm that swim through the water, whereas ferns have spores that are carried by the wind.
Why must bryophytes live in places where there is standing water for at least part of the year?
Bryophytes have life cycles that depend on water for reproduction. At one time in their life cycle, bryophytes produce sperm that must swim through water to reach the eggs of other individuals. Therefore, they must live in places where there is rainfall or dew for at least part of the year.
What purpose do the Rhizoids serve?
Rhizoids absorb water and nutrients from the soil through the process of capillary action. Capillary action allows the water to move through rhizoids. Rhizoids are attached to roots and allow plants to absorb water from the soil rather than living in water.
What is the moss life cycle highly dependent on?
Mosses and their relatives belong to a group called sporophytes. 9. The moss life cycle is highly dependent on fertile soil.
Are both grass and moss are examples of plants?
Both grasses and mosses are examples of plants. 2. Green algae are now considered to be protists.
What is the life cycle of a moss?
The life cycle of a moss, like all plants, is characterized by an alternation of generations. A diploid generation, called the sporophyte, follows a haploid generation, called the gametophyte, which is in turn followed by the next sporophyte generation.
Does Moss reproduce asexually?
Mosses reproduce by spores, which are analogous to the flowering plant’s seed; however, moss spores are single celled and more primitive than the seed. Mosses also spread asexually by sending out new shoots in the spring from last years plants as well as fragmentation.
What is Moss and how does it grow?
About Moss Moss is a rootless plant that grows in a mat of fine threads. Moss that is allowed to grow unchecked can form a dense growth over the soil that restricts the growth of other plants. In most cases moss does not kill plants that are already growing but takes advantage of bare spots in your yard.
Is Gemmae present in Funaria?
(d) Gemmae: Gemmae (Fig. 6.48B) are multicellular green bodies formed from the terminal cells of the protonema. They remain dormant throughout the unfavourable condition. However, on return of favourable condition, a gemma detaches from the parent plant body and later germinates into a new plant.
Why is marchantia called liverwort?
The term liverwort originated from the fact that the early herbalists thought that one of the liverworts had some resemblance to a liver – and some use as medicine for liver ailments. Hence the word liverwort for a “liver-like small plant”.
Which tissue is absent in Funaria?
Foot, seta and central sterile portion of theca is called columella found in Funaria. Elaters are absent in Funaria.
Which conducting tissue is absent?
Bryophytes have a well-differentiated plant body with stem and leaf-like structures. They do not have conducting or vascular tissues, i.e, xylem, and phloem.
Which tissue is present in Funaria?
These are primitive multicellular, autotrophic, shade-loving, amphibious plants. They reproduce by spore formation. They have no vascular system. Conducting tissue present is parenchyma.