Home
Class 12
BIOLOGY
Which of the following is not found in t...

Which of the following is not found in the phylum Chordata?

A

A dorsal hollow nerve chord

B

Lateral paired gill slits during development

C

Anotochord at some stage of development

D

An external skeleton

Text Solution

AI Generated Solution

The correct Answer is:
To determine which option is not found in the phylum Chordata, we need to review the key characteristics of this phylum. Here’s a step-by-step solution: ### Step-by-Step Solution: 1. **Understand the Key Characteristics of Chordata**: - Chordates are defined by four main characteristics at some stage of their development: - Dorsal hollow nerve cord - Notochord - Pharyngeal (gill) slits - Post-anal tail 2. **Analyze the Options**: - We need to evaluate each option provided in the question to see if it aligns with the characteristics of Chordata. 3. **Identify the Characteristics**: - **Dorsal Hollow Nerve Cord**: Present in all chordates. - **Notochord**: Present at some stage of development in all chordates. - **Gill Slits**: Present during the embryonic stage in many chordates. - **Post-Anal Tail**: Present in all chordates at some stage. 4. **Identify the Incorrect Option**: - The question asks for the characteristic that is **not** found in Chordata. - The option that mentions an **external skeleton** does not fit because chordates typically have an **internal skeleton** made of bones or cartilage. 5. **Conclusion**: - Therefore, the characteristic that is not found in the phylum Chordata is the **external skeleton**. ### Final Answer: The characteristic that is not found in the phylum Chordata is the **external skeleton**. ---
Promotional Banner

Similar Questions

Explore conceptually related problems

Which of the following is not associated with phylum arthropoda

Which of the following is absent in phylum-Echinodermata ?

Non Chordata

Which of the following belongs to the phylum annelida

Which of the following is not a character of phylum hemichordata?

which of the following is not a character of chordata

Which one of the following belongs to phylum Arthropoda?