Advertisements
Advertisements
प्रश्न
Amphibians do not have the following
विकल्प
Three chambered heart
Gills or lungs
Scales
Mucus glands
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Define and understand the following term:
Class
Illustrate the taxonomical hierarchy with suitable examples of a plant and an animal.
Name one example of the animal which shows the following characteristics:
Fixed animals with a pore-bearing body:
Classify the following organisms based on the absence/presence of true coelom (i.e., acoelomate, pseudocoelomate and coelomate)
Spongilla, Sea anemone, Planaria, Liver fluke Wuchereria, Ascaris, Nereis, Earthworm, Scorpion, Birds, Fishes, Horse.
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.
Which is not an insect?
Order is a number of related families having common characters placed in an order.
Identity the incorrect statement:
The taxonomic unit ‘Phylum’ in the classification of animals is equivalent to which hierarchical level in classification of plants.
What is the difference between flora, fauna and vegetation? Eichhornia crassipes is called as an exotic species while Rauwolfia serpentina is an endemic species in India. What do these terms exotic and endemic refer to?
