which of the following plant belongs to gymnosperm 1.marchantia2.chara3.cycus4.Iycopodium
Answers
Answer:
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The answer is : 3. Cycas.
Explanation:
Gymnosperms are the naked seed-bearing plants. A naked seed means that the ovules are not completely enclosed by sporophytic tissue at the time of fertilization.
Most of the seed plants have pollen, which contains and transports the sperm to fertilize the egg.
As pollen is resistant to desiccation, the sperm can be transported between plants across large distances without drying up.
The gymnosperms (naked seed plants) consists of four phyla. These are conifers, cycads, gingkoes, and gnetophytes. Cycads produce pollen, but the sperm still swims down the pollen tube using flagella.
As it also has a naked seed, it is classified as a gymnosperm.
Hence, option 3 is correct.
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The correct answer is OPTION 3: Cycas
- Gymnosperms are seed-bearing, non-leafy plants. The seed is called a naked seed when the ovules are not completely encased by sporophytic tissue at the time of fertilization.
- Pollen is found in most seed plants and transfers sperm to the egg to fertilize it.
- Pollen is water-resistant, thus sperm can travel large distances between plants without drying out.
- Gymnosperms are divided into four phyla (bare seed plants). Examples include conifers, cycads, ginkgoes, and gnetophytes.
- Even though cycads make pollen, sperm is still conveyed along the pollen tube by flagella. Because it has a naked seed, it is classified as a gymnosperm.