Home
Class 11
BIOLOGY
Notochord is present throughout the life...

Notochord is present throughout the life is

A

Fish

B

Leech

C

Amphibia

D

Amphioxus

Text Solution

AI Generated Solution

The correct Answer is:
To determine which organism has a notochord that is present throughout its life, we can analyze the options provided: 1. **Understanding the Notochord**: The notochord is a flexible rod-like structure that provides support and is a characteristic feature of chordates. In some organisms, it is present only during certain life stages, while in others, it persists throughout life. 2. **Analyzing the Options**: - **A. Fish**: In most fish, the notochord is replaced by the vertebral column (backbone) during development, so it does not persist throughout life. - **B. Leech**: Leeches are not chordates; they belong to the phylum Annelida and do not have a notochord. - **C. Amphibia**: In amphibians, the notochord is present during the larval stage (like in tadpoles) but is replaced by the vertebral column as they mature into adults. - **D. Amphioxus**: Amphioxus, also known as lancelets, is a cephalochordate. In these organisms, the notochord is present from head to tail and persists throughout their entire life. 3. **Conclusion**: Based on the analysis, the organism that has a notochord present throughout its life is **D. Amphioxus**. ### Final Answer: The notochord is present throughout the life in **D. Amphioxus**.
Promotional Banner

Similar Questions

Explore conceptually related problems

Notochord is a

Notochord is present in

The characteristic of Vertebrata are I. high degree of cephalisation is seen in the group. II. Coelom is well-devoloped and of enterocoelous type. III. Cranial nerves either 8,10or 12 pairs. IV. Notochord is seen throughout the life of all animals.

Notochord persists throughout the life in

(a) Identify the organism in the following figure (b) Label the parts number 1 to 4 (c) Name the phylum in which notochord is present (d) Name the subphylum in which notochord is present throughout life

Select the option with a correct representation of an animal belonging to the below mentioned class of vertebrates. I. The notochord is persisitent throughout life. The mouth is ventral. II. The skin is moist without scales . The tail may be present. III. 6 to 15 pairs of gill slits. Jaws absent. IV. Viviparous usually. pinna present in most of the members.

Choose the correct statements : I. Cartilaginous fish swims continously due to the presence of an air bladder. II. Osteichthyes have four pairs of gills that are covered by an operculum. III. The notochord is persistent throughout life in Chondrichthyes. IV. Teeth of cartilaginous fishes are modified placoid scales.

Notochord is used in

Which of the following statements are true for the phylum-Chordata? (a) In urochordata notochord extends from head to tail and it is present throughout their life. (b) In vertebrata notochord is present during the embryonic period only. (c) Central nervous system is dorsal and hollow. (d) Chordata is divided into 3 subphyla: Hemichordata,Tunicata and Cephalochordata.