1 Many animals that undergo metamorphosis switch from a sedentary lifestyle to o
ID: 265583 • Letter: 1
Question
1 Many animals that undergo metamorphosis switch from a sedentary lifestyle to one in which they are highly mobile, and able to undergo geographic dispersal; others are able to disperse as larvae, and then metamorphose into a sedentary adult. Describe the pre- and post-metamorphosis dispersal capabilities of Abalone Barnacles Butterflies Sea Urchins 2. Before it undergoes metamorphosis, an amphibian excretes its nitrogenous wastes in the form of ammonia. After metamorphosis, nitrogenous waste is excreted as urea a. Why ammonia before metamorphosis, and urea after? b. What metabolic pathway needs to be put into place for the post-metamorphosis amphibian to generate urea? A sketch might be helpful here.Explanation / Answer
1.Ans- Sea urchins
Metamorphosis is a process of extreme, rapid physical changes of an animal after birth. Pre-metamorphic animals consume different resources from their adult forms. For example- tadpoles live in water and eating algae and plants while they become frogs, live on land, breathing air and eating insects.
The larva of the sea urchin can travel on ocean currents and the adult urchin leads into a sedentary form. The larvae of butterflies are involved in mainly feeding and their adult forms are involved for flight and reproduction. Abalone larvae show no changes in their larval shell size and morphology during metamorphosis.
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