Soap box like cell wall is characteristic of :-a)Archae bacteriab)Diatomsc)Dinoflagellatesd)EuglenoidsCorrect answer is option 'D'. Can you explain this answer?

Question

Answer

Soap box like cell wall is characteristic of diatoms
these organisms live in either fresh water and marine water
_diatoms and golden algae
_microscopic and float passively in water currents(plankton)
_photosynthetic
_cell wall_two thin overlapping shells, epitheca over hypotheca which fit together as soap box
_the walls are embedded with silica
_the walls are indestructible called diatomaceius earth
_used in polishing, filtration if ouls and syrups
_chief producers of oceans
_centrale diatoms_radially symmetrical
_pennale diatoms_ bilaterally stmmetrical

Answer

The correct answer is diatom because they have two layers epithica {outer} and hypotheca {inner} which are fitted over each other like a soapbox

Answer

Diatoms

Answer

**Soap box-like cell wall is characteristic of diatoms.**

**Explanation:**

Diatoms are a type of unicellular algae that belong to the phylum Bacillariophyta. They are characterized by their unique cell wall structure, which consists of two overlapping silica (silicon dioxide) valves. The valves fit together like a soap box, giving diatoms their distinctive shape.

The cell wall of diatoms is called a frustule and is composed of two parts: the epitheca and the hypotheca. The epitheca is the upper valve, while the hypotheca is the lower valve. These valves are made up of intricate patterns of pores, ridges, and spines, which vary in shape and arrangement depending on the species.

**Importance of the Soap Box-like Cell Wall:**

The soap box-like cell wall of diatoms serves several important functions:

1. **Protection:** The silica cell wall provides mechanical strength and rigidity, protecting the delicate protoplast of the diatom cell. It acts as a physical barrier against predators, herbivores, and mechanical damage.

2. **Buoyancy:** The intricate patterns on the cell wall, along with air-filled spaces between the valves, contribute to the buoyancy of diatoms. This allows them to float in water bodies, optimizing their exposure to light for photosynthesis.

3. **Gas Exchange:** The pores and channels in the cell wall facilitate the exchange of gases, allowing diatoms to take up carbon dioxide for photosynthesis and release oxygen.

4. **Nutrient Uptake:** The cell wall of diatoms contains specialized structures called raphe, which are elongated slits or grooves. The raphe function in nutrient uptake, allowing diatoms to absorb dissolved organic and inorganic nutrients from their environment.

5. **Reproduction:** The unique cell wall structure of diatoms plays a crucial role in their reproduction. During cell division, diatoms synthesize new valves that fit inside the old ones, resulting in two daughter cells. This process, known as auxospore formation, ensures that the size of diatoms is maintained within a specific range.

In conclusion, the soap box-like cell wall is a characteristic feature of diatoms. It provides protection, buoyancy, facilitates gas exchange and nutrient uptake, and is essential for their reproductive process.

Answer

The correct answer is diatoms. Euglenoids lack cell wall.

Answer

GsFYIk

Answer

Prefer ncert ,answer is diatoms

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