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MODEL PAPER 7 — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYMODEL PAPER 73 Marks
Question
List the main features of class Reptilia.
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Answer

Main features of class reptilia are:
i. They are the first truly terrestrial vertebrates.
ii. They have dry skin covered with scales.
iii. They are tetrapods and pentadactyl.
iv. The hands and feet have claws.
v. Lungs are well-developed and reptiles never breathe by gills.
vi. There is vo larval stage in its development.
vii. The ventricle of the heart is partially divided into two by an incomplete septum but this division is complete in the crocodiles.

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