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Animal Kingdom — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYAnimal Kingdom5 Marks
Question
  1. Mention two functions of cnidoblasts.
  2. Write any four differences between reptiles and mammals.
✓

Answer

  1. Cnidoblasts serve for anchorages defense and food capture.
  2.  
 
Reptiles
Mammals
1.
These are poikilotherms.
These are hornocotherms.
2.
Skin is dry and comified and has no glands.
Skin has glands and possesses hairs but not comified.
3.
Heart is three chambered (except crocodiles).
Heart is four chambered.
4.
Animals are Oviparous.
Animals are Viviparous.
5.
Mammary glands are not found.
Mammary glands are characteristically found.
6.
External ear (pinna) is absent.
External ear is present.

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