What is the difference between direct and indirect development?
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Direct development |
Indirect development |
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In this the embryo develops into a mature individual without involving a larval stage. |
Indirect development encompasses a larval stage that undergoes a metamorphic transition into a juvenile. |
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Metamorphosis is absent. |
Metamorphosis is present. |
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It occurs in fishes, reptiles, birds, and mammals |
It occurs in most of the invertebrates and amphibians. |
What are the reasons that you can think of for the arthropods to constitute the largest group of the animal kingdom?
What are the peculiar features that you find in parasitic platyhelminthes?
What are the difficulties that you would face in classification of animals, if common fundamental features are not taken into account?
Distinguish between intracellular and extracellular digestion?
