Question:
Metagenesis refers to
Metagenesis refers to
Updated On: Jul 11, 2024
- occurrence of a drastic change in form during post-embryonic development
- presence of a segmented body and partheno- genetic mode of reproduction
- presence of different morphic forms
- alternation of generation between asexual and sexual phases of an organism.
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The Correct Option is D
Solution and Explanation
An alternation of generation between asexual and sexual phases of an organism is referred to as metagenesis. E.g. in Obelia (a coelenterate), polyps reproduce asexually and medusae reproduce sexually.
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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