Long Answer TypeWhat are the modifications that are observed in birds that help them fly?
Birds have undergone many structural adaptations to suit their aerial life. Some of these adaptations are as follows:
(i) Streamlined body for rapid and smooth movement and to counter the resistance offered by the air current.
(ii) Covering of feathers for insulation.
(iii) Forelimbs modified into wings and hind limbs used for walking, perching, and swimming.
(iv) Presence of pneumatic bones to reduce weight.
(v) Presence of additional air sacs to supplement respiration.
(vi) Endoskeleton has hollow long bones to reduce weight that favors flying.
(vii) Uricotelic excretion that helps to reduce storage of water to reduce weight.
Could the number of eggs or young ones produced by an oviparous and viviparous mother be equal? Why?
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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