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MODEL PAPER 4 — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYMODEL PAPER 43 Marks
Question
Which features make mammals as the most successful and dominant animals?
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Answer

Features which make mammals as dominant and successful animals are as follows:
i. The presence of an insulating and protective hairy exoskeleton.
ii. They are warm-blooded so have a high rate of metabolism.
iii. They are viviparous animals and show placentation and intrauterine development which increases the chances for survival of young ones.
iv. They show a high degree of parental care.
v. They have more developed hearing efficiency due to the presence of pinna, three ear-ossicles and coiled cochlea in the ear.
vi. They are able to speak through indicative/verbal language.
vii. They have a good power of learning due to the presence of a more developed brain.

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