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प्रश्न
Comment on the aquatic and terrestrial habits of amphibians.
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उत्तर
- The transition from aquatic to terrestrial living is clearly indicated in Amphibian.
- They are the first vertebrates to live on land.
- Amphibians have dual adaptation to living in aquatic and land environments.
- The double life is called amphibious.
- In frogs, the hind limbs have webbed feet.
- The skin is moist and glandular usually without scale.
- Respiration is by gills, lungs, skin and pharyngeal region.
- The heart has three chambers, with two auricles and a single ventricle.
- Fertilization is external.
- The larva is a tadpole, which is metamorphoses into an adult.
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संबंधित प्रश्न
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Identify a member of porifera
The skeletal framework of the phylum Porifera is made up of ______.
A true body cavity is located within ______.
Body having meshwork of cells, internal cavities lined with food filtering flagellated cells and indirect developments are the characteristics of phylum
Given below are types of cells present in some animals. Which of the following cells can differentiate to perform different functions?
Match the column A with column B and choose the correct option
| Column I | Column II |
| A. Porifera | i. Canal system |
| B. Aschelminthes | ii. Water-vascular system |
| C. Annelida | iii. Muscular pharynx |
| D. Arthropoda | iv. Jointed appendages |
| E. Echinodermata | v. Metameres |
Sponges have special cells present on their body, they are known as ______ cells.
Name the asexual reproductive structures of Sponges.
