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प्रश्न
Amphibians do not have the following
विकल्प
Three chambered heart
Gills or lungs
Scales
Mucus glands
उत्तर
Scales
Explanation -
Amphibians do not have scales, instead, their skin has mucous secreting glands.
Fish, along with reptiles, have hard protective scales on their skin for protection. The outer body of many fish is covered with scales, which are part of the fish’s integumentary system. The scales originate from the mesoderm (skin). One major characteristic of reptiles is the presence of scales composed of a protein called keratin. These scales form a waterproof barrier of the skin, which allows reptiles to exist away from water without the threat of dehydration. Amphibians use their skin as secondary respiratory surfaces. Their skin is permeable to water and gases and is lined by mucous.
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संबंधित प्रश्न
Try to collect all the currently accepted meanings for the word ‘species’. Discuss with your teacher the meaning of species in the case of higher plants and animals on one hand and bacteria on the other:
Define and understand the following term:
Family
Define and understand the following term:
Genus
How are organisms classified?
Which among the following have scales?
- Amphibians
- Pisces
- Reptiles
- Mammals
Which is not an aquatic animal?
You are given leech, Nereis, Scolopendra, prawn and scorpion; and all have segmented body organisation. Will you classify them in one group? If no, give the important characters based on which you will separate these organisms into different groups.
Animals belonging to phylum protozoa reproduce by fission.
As we go from species to kingdom in a taxonomic hierarchy, the number of common characteristics ______.
Genus represents ______.
