Class 9 Exam > Class 9 Videos > Biology for Class 9 > Chordates - Part 1 (Easy Explanation)
Chordates - Part 1 (Easy Explanation) Video Lecture | Biology for Class 9
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FAQs on Chordates - Part 1 (Easy Explanation) Video Lecture - Biology for Class 9
| 1. What are chordates? |  |
Ans. Chordates are a group of animals that have a notochord, a hollow nerve cord, pharyngeal slits, and a post-anal tail at some point in their life cycle.
| 2. What are some examples of chordates? | |
Ans. Some examples of chordates include fish, amphibians, reptiles, birds, and mammals.
| 3. What is a notochord? | |
Ans. A notochord is a flexible rod-like structure that provides support to the body and helps in locomotion. It is present in the embryos of chordates and is replaced by the backbone in vertebrates.
| 4. What is the function of the hollow nerve cord in chordates? | |
Ans. The hollow nerve cord in chordates serves as the central nervous system, transmitting signals between different parts of the body and the brain. It plays a crucial role in coordinating movements and responses to stimuli.
| 5. What are pharyngeal slits in chordates? | |
Ans. Pharyngeal slits in chordates are openings in the pharynx (throat) region that connect the mouth cavity to the outside environment. In aquatic chordates, these slits are used for filter feeding and respiration, while in terrestrial chordates, they are modified for other functions such as hearing or swallowing.
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Dec 23, 2024 Last updated |
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