Hey
Here are few questions, pls solve it...
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1. Name the hormone that helps in metamorphosis in tadpoles.
2. Describe the external morphology of a cockroach.
3. What is Haemocoel and spawn?
4. Could the number of eggs or young ones produced by an oviparous and viviparous mother be equal? why?
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Answers
hey there!
Ans. 1.
Thyroxine hormone helps the tadpole in its metamorphosis.
Ans. 2.
The body of cockroach is divisible into three distinct region. They are head, thorax and abdomen. There is a hard exoskeleton that is brown in color and made up of chitin.
Ans. 3.
Haemocoel is the primary body cavity of most invertebrate, in which blood doesn't flow in blood vessels as they lack it.
Spawn is the egg and sperm released into water by aquatic animals such as the members of class amphibians.
Ans. 4.
An oviparous animal always produces more numbers of egg than the young one produced by viviparous animal. This is because their eggs are exposed to external environment and predators and they have to pass through a large number of developmental stages before becoming an adult. The large number of egg compensates the inevitable loss and ensures the continuation of race.
Thankyou!
Hope it helps.