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A list of some animals is given below in...

A list of some animals is given below in a box.
Nereis, Culex, Limulus, Bombyx, Ascaris, Ancylostoma, Apis, Locusta, Taenia, Pila, Dentalium, Loligo, Asterias, Pheretima.
How many of them have bilateral symmetry, open circulatory system and segmented body?

A

Four

B

Five

C

Six

D

Eight

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question of how many animals from the given list exhibit bilateral symmetry, an open circulatory system, and a segmented body, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Characteristics**: - **Bilateral Symmetry**: This means the body can be divided into two identical halves. - **Open Circulatory System**: This is a type of circulatory system where blood is not always contained within blood vessels. - **Segmented Body**: This means the body is divided into repeated segments. 2. **List the Animals**: The animals provided are: - Nereis - Culex - Limulus - Bombyx - Ascaris - Ancylostoma - Apis - Locusta - Taenia - Pila - Dentalium - Loligo - Asterias - Pheretima 3. **Classify Each Animal**: - **Nereis**: Bilateral symmetry, segmented body (Annelida). - **Culex**: Bilateral symmetry, segmented body (Arthropoda). - **Limulus**: Bilateral symmetry, segmented body (Arthropoda). - **Bombyx**: Bilateral symmetry, segmented body (Arthropoda). - **Ascaris**: Bilateral symmetry, but not segmented (Nematoda). - **Ancylostoma**: Bilateral symmetry, but not segmented (Nematoda). - **Apis**: Bilateral symmetry, segmented body (Arthropoda). - **Locusta**: Bilateral symmetry, segmented body (Arthropoda). - **Taenia**: Bilateral symmetry, but not segmented (Platyhelminthes). - **Pila**: Bilateral symmetry, but not segmented (Mollusca). - **Dentalium**: Bilateral symmetry, but not segmented (Mollusca). - **Loligo**: Bilateral symmetry, but not segmented (Mollusca). - **Asterias**: Radial symmetry in adults (Echinodermata). - **Pheretima**: Bilateral symmetry, segmented body (Annelida). 4. **Count the Animals with All Three Characteristics**: From the classification: - Nereis - Culex - Limulus - Bombyx - Apis - Locusta - Pheretima These animals exhibit bilateral symmetry, an open circulatory system, and a segmented body. 5. **Final Count**: The total number of animals that meet all three criteria is **6** (Nereis, Culex, Limulus, Bombyx, Apis, Locusta, Pheretima). ### Conclusion: The answer to the question is **6** animals.
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