Question:
Which one of the following statements is wrong ?
Which one of the following statements is wrong ?
Updated On: Apr 20, 2025
- Algae increase the level of dissolved oxygen in the immediate environment
- Algin is obtained from red algae, and carrageenan from brown algae
- Agar-agar is obtained from Gelidium and Gracilaria
- Laminaria and Sargassum are used as food
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The Correct Option is B
Solution and Explanation
This statement is incorrect because it has the sources of algin and carrageenan reversed.
- Algin is actually obtained from brown algae such as Laminaria and Macrocystis.
- Carrageenan is obtained from red algae such as Chondrus and Gigartina.
The other statements are correct:
- Algae increase dissolved oxygen through photosynthesis.
- Agar-agar is obtained from Gelidium and Gracilaria, which are red algae.
- Laminaria and Sargassum are types of brown algae used as food, especially in Asian countries.
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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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