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Question:
In which of the following plants, reproductive structures lack a layer of sterile vegetative cells surrounding the gametes?
In which of the following plants, reproductive structures lack a layer of sterile vegetative cells surrounding the gametes?
Updated On: Jun 23, 2023
- Ectocarpus
- Riccia
- Funaria
- Cycas
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The Correct Option is A
Solution and Explanation
The sex organs in plants other than algae like in Riccia, Funaria (bryophytes) and Cycas (gymnosperm) are multicellular and jacketed. The jacket of sterile cells around the sperms and eggs is an adaptation to a life on land. In Ectocarpus (algae) sex organs are non jacketed.
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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.
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