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Which one is false...

Which one is false

A

Nephrons perform excretion through filtration, reabsorption and secretion

B

Nephridia are accessory excretory organs in Prawn

C

Tapeworm have excretory flame cells

D

Nephrons begin with Bowman's capsule having glomerulus

Text Solution

AI Generated Solution

The correct Answer is:
To determine which statement is false, we will analyze each statement one by one. ### Step-by-Step Solution: 1. **Statement 1: Nephrons perform excretion through filtration, reabsorption, and excretion.** - **Analysis:** Nephrons are indeed the structural and functional units of the kidneys. They perform excretion through three main processes: - **Filtration:** Blood is filtered in the glomerulus, and waste materials are separated from the blood. - **Reabsorption:** Essential substances like water, glucose, and ions are reabsorbed back into the bloodstream. - **Excretion:** The remaining waste products are excreted as urine. - **Conclusion:** This statement is **true**. 2. **Statement 2: Nephridia are accessory excretory organs in prawn.** - **Analysis:** In prawns, the primary excretory organs are the green glands (also known as antennal glands). Nephridia are not present in prawns; they are found in other organisms like annelids (e.g., earthworms) and serve as excretory organs there. Thus, this statement is incorrect. - **Conclusion:** This statement is **false**. 3. **Statement 3: Tapeworms have excretory flame cells.** - **Analysis:** Tapeworms (cestodes) do possess flame cells, which are part of their excretory system. Flame cells help in the removal of waste products through a network of tubules. - **Conclusion:** This statement is **true**. 4. **Statement 4: Nephrons begin with Bowman's capsule having glomerulus.** - **Analysis:** The nephron structure indeed begins with the Bowman's capsule, which encases the glomerulus. This is a well-established fact in renal anatomy. - **Conclusion:** This statement is **true**. ### Final Conclusion: The false statement among the options provided is **Statement 2: Nephridia are accessory excretory organs in prawn**. ---
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