Q.15:- Prepare a list of some animals that are found parasitic on human beings.   Answer Ascaris, Wucheraria, Acylostoma, Taenia, Fasciola.

Q.14:- Match the following: (a) Operculum (i) Ctenophora (b) Parapodia (ii) Mollusca (c) Scales (iii) Porifera (d) Comb plates (iv) Reptilia (e) Radula (v) Annelida (f) Hairs (vi) Cyclostomata and…

Q.13:- Segmentation in the body is first observed in which of the following: (a) Platyhelminthes (b) Aschelminthes (c) Annelida (d) Arthropoda   Answer The body segmentation first appeared is Annelida.

Q.12:- Could the number of eggs or young ones produced by an oviparous and viviparous mother be equal? Why?   Answer The numbers of eggs produced by an oviparous mother will…

Q.11:- What are the modifications that are observed in birds that help them fly?   Answer Birds have undergone many structural adaptations to suit their aerial life. Some of these adaptations…

Q.10:- How important is the presence of air bladder in Pisces?   Answer Gas bladder or air bladder is a gas filled sac present in fishes. It helps in maintaining buoyancy….

Q.9:- “All vertebrates are chordates but all chordates are not vertebrates”. Justify the statement.   Answer The characteristic features of the phylum, Chordata, include the presence of a notochord and paired…

Q.8:- Water vascular system is the characteristic of which group of the following: (a) Porifera (b) Ctenophora (c) Echinodermata (d) Chordata   Answer Water vascular system is a characteristic feature of…

Q.7:- What are the reasons that you can think of for the arthropods to constitute the largest group of the animal kingdom?   Answer The phylum, Arthropoda, consists of more than…

Q.6:- What are the peculiar features that you find in parasitic platyhelminthes?   Answer  Taenia (Tapeworm) and Fasciola (liver fluke) are examples of parasitic platyhelminthes. Peculiar features in parasitic platyhelminthes…