Long Answer TypeCould the number of eggs or young ones produced by an oviparous and viviparous mother be equal? Why?
The numbers of eggs produced by an oviparous mother will always be more than the young ones produced by a viviparous mother. This is because in oviparous animals, the development of young ones takes place outside the mother's body. Thus, their eggs are vulnerable because of the harsh environmental conditions and predators. Therefore, to overcome the loss, more eggs are produced by mothers so that even under harsh environmental conditions, some eggs are able to survive and produce young ones.
On the other hand, in viviparous organisms, the development of young ones takes place inside the body of the mother. Since the development takes place inside the body the young one is less exposed to environmental conditions and predators. Therefore, there are more chances of their survival and hence, less number of young ones is produced compared to the number of eggs.
Multiple Choice QuestionsSegmentation in the body is first observed in which of the following
Platyhelminthes
Aschelminthes
Annelida
Arthropoda
Match The FollowingMatch the following:
| A. Operculum | (i) Ctenophora |
| B. Parapodia | (ii) Mollusca |
| C. Scales | (iii) Porifera |
| D. Scales | (iv) Reptilia |
| E. Radula | (v) Annelida |
| F. Hairs | (vi) Cyclostomata and Chondrichthyes |
| G. Choanocytes | (vii) Mammalia |
| H. Gill slits | (viii) Osteichthyes |
Short Answer TypeMultiple Choice QuestionsIn some animal groups, the body is found divided into compartments with at least some organs/ organ repeated. This characteristic feature is named
Segmentation
Metamerism
Metagenesis
Metamorphosis
Given below are types of cells present in some animals. Which of the following cells can differentiate to perform different functions?
Choanocytes
Interstitial cells
Gastrodermal cells
Nematocytes
Which one of the following sets of animals share a four chambered heart?
Amphibian, Reptiles, Birds
Crocodiles, Birds, Mammals
Crocodiles, Lizards, Turtles
Lizards, Mammals, Birds
Which of the following pairs of animals has non-glandular skin
Snake and Frog
Chameleon and Turtle
Frog and Pigeon
Crocodile and Tiger
Birds and mammals share one of the following characteristics as a common feature.
Pigmented skin
Alimentary canal with some modification
Vivipary
Warm-blooded nature
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