Which of the following organisms possess an e | vedclass

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(B) An endoskeleton is a skeleton found within the interior of the body of an animal. In humans,the endoskeleton is made of bones and cartilage. In Ba

Vedclass · Accepted Answer

Humans and Balanoglossus

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(B) An endoskeleton is a skeleton found within the interior of the body of an animal. In humans,the endoskeleton is made of bones and cartilage. In Balanoglossus (a hemichordate),the proboscis contains a structure called the stomochord,which is often considered a primitive form of an endoskeleton. Earthworms and cockroaches possess an exoskeleton or lack a rigid internal skeletal system. Starfish possess an endoskeleton made of calcareous ossicles,but among the given options,the most appropriate grouping for organisms possessing an endoskeleton is humans and Balanoglossus.

Which of the following organisms possess an endoskeleton?

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In which of the following phyla are kidneys first present as excretory organs?

Which of the following is a superclass of Gnathostomata?

Assertion $(A)$: $Ascidia$ and $Salpa$ are placed under sub-phylum $Urochordata$.
Reason $(R)$: In $Ascidia$ and $Salpa$,notochord is present only in larval tail.
In the light of the above statements,choose the most appropriate answer from the options given below:

Which of the following organisms possess a notochord only in the larval stage?

Write the characteristics of animals that possess a notochord throughout their life.

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