Table of Contents
Which form of a plant produces spores?
sporophyte
The diploid stage of a plant (2n), the sporophyte, bears a sporangium, an organ that produces spores during meiosis. Homosporous plants produce one type of spore which develops into a gametophyte (1n) with both male and female organs.
What is seedless plant?
[ sēd′lĭs ] A plant that does not produce seeds. Ferns, horsetails, and all the bryophytes are seedless plants.
Are spores produced by mitosis or meiosis?
In plants, spores are usually haploid and unicellular and are produced by meiosis in the sporangium of a diploid sporophyte. Under favourable conditions the spore can develop into a new organism using mitotic division, producing a multicellular gametophyte, which eventually goes on to produce gametes.
How spores are produced in plants?
Spores are an asexual form of reproduction; the plant or fungus doesn’t need to mate with another plant or fungus to form these particles. A spore is typically a single cell surrounded by a thick cell wall for protection. Once the spores are formed, the organism releases them into the environment to grow and thrive.
How does the reproduction of seedless plants differ from that of seed plants?
The difference between seed plants and seedless plants is that seedless plants do not bear seeds for propagation, whereas seed plants bear seeds for multiplication. Seedless plants multiply by spores that may produced asexually or as a consequence of asexual reproduction.
How does a seedless vascular plant produce a gametophyte?
Most seedless vascular plants produce one type of spore that gives rise to a bisexual gametophyte. The gametophytes are smaller and less structurally complex than the sporophytes, but they can photosynthesize and do not depend on the sporophyte for nourishment or protection. Egg and sperm cells fuse through fertilization, forming a diploid zygote.
What are some examples of seedless vascular plants?
In seedless vascular plants, the sporophyte became the dominant phase of the lifecycle. Water is still required for fertilization of seedless vascular plants, and most favor a moist environment. Modern-day seedless vascular plants include club mosses, horsetails, ferns, and whisk ferns.
What do you need to know about seedless plants?
1 Classify seedless plants. An incredible variety of seedless plants populates the terrestrial landscape. 2 Early Plant Life. The kingdom Plantae constitutes large and varied groups of organisms. 3 Green Algae: Precursors of Land Plants. 4 Bryophytes. 5 Seedless Vascular Plants.
Where did seedless plants grow in the past?
Yet, seedless plants represent only a small fraction of the plants in our environment. Three hundred million years ago, seedless plants dominated the landscape and grew in the enormous swampy forests of the Carboniferous period.