Question:
A prothallus is
A prothallus is
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In some pteridophytes, a single prothallus bears both males as well as female sex organs.
Updated On: Jun 23, 2023
- a structure in pteridophytes formed before the thallus develops
- a sporophytic free living structure formed in pteridophytes
- a gametophyte free living structure formed in pteridophytes
- a primitive structure formed after fertilisation in pteridophytes
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The Correct Option is C
Solution and Explanation
A prothallus is a small flattened multicellular structure representing independent gametophyte generation in pteridophytes. For example - club mosses, horsetails, and ferns. In some pteridophytes, a single prothallus bears both males as well as female sex organs. In others, there are separate male and female prothalli.
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Concepts Used:
Plant Kingdom
The Plant Kingdom comprises all the plants that have some shared characteristics. These are bacteria (prokaryotes), photosynthetic plants, fungi, and several non-photosynthetic plants.
Read Also: Two Kingdom Classification
Several features of Kingdom Plantae are as follows:
- They are stationary. They are static and usually remain in one place only.
- They have branches that expanded and green leaves due to the presence of chlorophyll.
- They are an autotrophic mode of nutrition that simply means they prepare their food with the help of water, sunlight and carbon dioxide. It is further known as self-nutrition.
- They indulge in photosynthesis during the day and therefore more carbon dioxide is needed during the day and at night it is released.
- They secure their food in the form of starch-like algae.
- They have an inelastic wall around their cell known as a cell wall comprised of cellulose.
- There is an absence of the nervous system and excretory system.
- Reproduction is entirely dependent on air, insects and water. Asexual and vegetative method of reproduction is noticed or detected.
- The non-photosynthetic plants acquire their food through parasitism, i.e through their host like Indian pipe.
Read More: Classification of Plants