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Biology
Animal Kingdom
123 questions from 38 papers, each with its answer.
- 123 questions
- 38 papers
- 3.49% of Biology
Class Aves – characteristic features
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Identify the vertebrate group of animals characterized by crop and gizzard in its digestive system
Birds have a crop for storage and a gizzard for grinding.
The digestive tract of Aves has additional chambers: crop and gizzard. Crop is concerned with storage of food grains; gizzard is a masticatory organ in birds used to crush food grains.
Thermoregulation – poikilotherms and homeotherms
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Which one of these animals is not a homeotherm?
$Chelone$ is a reptile; the others are mammals or birds.
Homeotherms are animals that maintain a constant body temperature, irrespective of surrounding temperature. Birds and mammals are homeotherms. $Chelone$ (turtle) belongs to class Reptilia, which is poikilothermic (cold-blooded).
Direct and indirect development
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Which of the following animals does not undergo metamorphosis?
Earthworm has direct development without a larva.
Metamorphosis refers to the transformation of a larva into an adult. Animals that perform metamorphosis are said to have indirect development. In earthworm, development is direct, which means no larval stage and hence no metamorphosis.
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