Group the following animals on the basis of symmetry and give a suitable title for each category.(1 score)
Asterias, Hirudinaria, Octopus, Hydra.

Categorise the following terms into two. Give suitable title for each category. Species, Museum, Class, Genus, Zoological park, Herbarium.

Arrange the following points in a two column table and give suitable heading for each column. a) Notochord present b) Post ahal tail absent c) Pharynx Perforated by gill slits d) Notochord absent e) Posts anal tail present f) Gill slits are absent

Examin carefully the details given and group similar one in the table. Given suitable title for each column. Analyse the importance of each group in evolution. (Wings of bat, flipper of whale, wings of butterfly, forelimbs of horse, wings of birds, rudementary body hair, wisdom teeth, vermiform appendix of man, patagium of draco)

Graph the following real functions. (each carries 2 scores) f(x)=1/x

Graph the following real functions. (each carries 2 scores) f(x)=(x-1)^2

Graph the following real functions. (each carries 2 scores) f(x)=3x^2-1

Arrange the following words into two groups and give and appropriate heading to each group. Testes, oviduct, cloaca, Bidder's canal, ovaries, urinogenital duct, vasa efferentia, cloaca.

Read the following Passage. Understand the Mathematical concept in it and answer the questions that follow. Each question carries 1 score. The common difference of the arithmetic sequence 15,14,13,12,...... is 14-15=-1 . First terms of the sequence is 15 and the 15th term is 15+14x-1=15-14=1 . Similarly the 4th term is 12 and the 12^(th) term is 4. Its 16th term is, x_(16)=15+15x-1=15-15=0 . So the sum of the first 31 terms is also zero. that is if the n^(th) is m, then the mth term is n and the (m+n)^(th) term is zero. Seventh term of an arithmetic sequence is 10 and the 10^(th) term is 7. What is the common difference?