Home
Class 12
BIOLOGY
First time excretory organs were develop...

First time excretory organs were developed in-

A

protozoa

B

flatworms

C

Annelids

D

insects

Text Solution

AI Generated Solution

The correct Answer is:
To answer the question about when excretory organs first developed, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding Excretion in Protozoa**: - Protozoa are unicellular organisms that do not have specialized excretory organs. They rely on diffusion to remove waste materials from their bodies. - **Conclusion**: Protozoa do not have developed excretory organs. 2. **Examining Flatworms**: - Flatworms, which are more complex than protozoa, possess specialized excretory cells known as flame cells. These cells are responsible for the excretion of waste materials. - **Conclusion**: Flatworms are the first organisms to have developed excretory organs (flame cells). 3. **Looking at Annelids**: - Annelids, such as earthworms, have a more advanced excretory system that includes structures called nephridia. This indicates a higher level of complexity compared to flatworms. - **Conclusion**: Annelids have excretory organs, but they are not the first to develop them. 4. **Considering Insects**: - Insects possess excretory structures like Malpighian tubules and green glands, which are even more advanced than those found in annelids and flatworms. - **Conclusion**: Insects have developed excretory organs, but they are not the first. 5. **Final Answer**: - Based on the analysis, the first excretory organs were developed in flatworms, specifically in the form of flame cells. ### Final Answer: The first time excretory organs were developed in flatworms. ---
Promotional Banner

Similar Questions

Explore conceptually related problems

Excretory organs origin

Kidneys are excretory organs in

The first organism were

The first organisms were

Excretory organs are absent in

In Housefly the excretory organs are

In annelids, excretory organs are