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Animal Kingdom
All chordates at one or other stage possess
two pairs of pentadactyl limbs
pharyngeal gill slits
movable jaw
vertebral column
B.
pharyngeal gill slits
In all the chordates, at some stage of their life history, a series of paired lateral gill clefts or gill slits perforate through the pharyngeal wall of the gut behind the mouth. They serve primarily for the passage of water from pharynx to outside.
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What are the peculiar features that you find in parasitic platyhelminthes?
What are the reasons that you can think of for the arthropods to constitute the largest group of the animal kingdom?
Water vascular system is the characteristic of which group of the following:
“All vertebrates are chordates but all chordates are not vertebrates”. Justify the statement.
How important is the presence of air bladder in Pisces?
What are the modifications that are observed in birds that help them fly?
Could the number of eggs or young ones produced by an oviparous and viviparous mother be equal? Why?
Segmentation in the body is first observed in which of the following
Match the following:
Prepare a list of some animals that are found parasitic on human beings.
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