CLASS X BIOLOGY

DAV Public School , Kailash Hills Class X Heredity and Evolution & Our environment Q1 . The genotype of green coloured Tomato plants is denoted as GG and that of purple stemmed Tomato plants as gg. When the two are crossed: a) What colour of stem would you expect in F1 progeny? b) Give the percentage of purple stemmed plants if F1 are self pollinated. c) In what ratio would you find the genotypes GG and Gg in the F2 progeny? Q2 .From the list given below, select the character which can be acquired but not inherited a) Colour of eye   b) Colour of skin  c) Size of body   d) Nature of hair Q3 .A basket of vegetables contains carrot, spinach, radish, potato, and tomato. Which one of them represent the correct homologous structures and analogous structures? Q.3 Which type of similarity , homologous and analogous occurs in the pairs of organs? a)       Forelimbs of bird and bat b)       Wings of bird and bat c)       Forelimbs of horse, Fins of Fish Q4

Why is there an ozone hole over Antarctica and not anywhere else? Check the link to find the answer..  

Complete your notes and NCERT Q.Ans in notebook and get it checked. Submit (individual) report on environmental topic alloted to you for integrated project.           i) Global warming     (Roll no 1-5) ii) Ozone depletion    (Roll no 6-10) iii) Rain water harvesting   (Roll no 11-15) iv) Biological magnification  (Roll No 16-20) v) The magic 3- Reduce, Recycle and Reuse   (Roll no 21-25) vi) Organic farming  (Roll no 26-30) vii) Carbon footprints- how to reduce them (Roll no 31-35) viii)Vanmahotsava (Plants that can be grown in kitchen garden/community parks.)(Roll no 36-40) ix) Disappearance of House sparrow (Roll no 41-46)        3. Revise chapter Reproduction for Science Quiz .        4. Get your practical files ( Experiments done so far) checked.