PHYSICS
CLASS - X
1.What is the difference between a clone and an offspring?
2.Give the scientific name of the plant that Mendel used for his experiments.
3.Define Genetic Engineering.
4.What is meant by haploid organism?
5.What is meant by diploid organism?
6.What are chromatids?
7.Why is a human females reffered to as homogametic?
8.What are transgenisc?
9.What is Palaeontology?
10.What is organic evolution?
11.What is chromosome?
12.What is chromosome?
13.Give examples of
(i)Homologous organs in animals.
(ii)Analogous organs in animals.
14.Who proposed the ‘Biogenetic Law’?
15.What is Biogenetic Law ?
16.What is the necessary condition for evolution to take place?
17.What is offspring?
18.What is nucleoside?
19.What is the basic idea of organic evolution?
20.Name the book written by Lamarck.
21.What are prokaryotes?
22.What are eukaryotes?
23.What disease is AIDS? How does it spread from one person to another?
24.List any two structural differences between DNA and RNA.
25.What is the significance of Archaeopteryx in organic evolution?
26.Taking any one example from human body, explain what is meant by vestigial organs.
27.Describe any two structural features in vertebrate embryos that support organic evolution.
28.What is mean by analogous organs? Taking a suitable exmple, explain how they support the theory of organic evolution.
29.All vertebrate embryos show some embryological evidence in support of their common ancestry. Explain it by taking any two structural features.
30.Mention any one striking similarity that is found in the embryos of all vertebrates at an early stage. What is it indicative of?
31.Mention any four details that can be inferred about organism from their fossils.
32.Describe the theory of inheritance of acquired characters. Who disproved it experimentally?
33.What are Lamarck’s theory of evolution? Explain the theory by quoting an example.
34.Mention any four details that can be inferred about organism from their fossils.
35.How do vestigial organs indicate about human ancestry? Explain by giving any two examples?
36.What do you call in short Lamarck’s theory of evolution? Who disproved it initially and how?
37.Birds have evolved from reptiles. How does palaeontology provide evidence in support of the above statement?
38.Archaeopteryx is considered as a connecting link between reptiles and birds. Justify this statement by giving two characters of each group.
39.What are fossils? Of what interest are fossils to the evolutionary biologists?
40.What are vestigeal organs? Name two vestigial organs in human body.
41.What are the two striking observations when different stages of embryos of different classes of vertebrates are studied comparatively. How does this study support evolution?
42.A chimpanzee can hold objects by its hand and an elephant by its trunk. Are these two organs analogous or homologous? Give reason in support of your answer.
43.Describe the evidence which decisively prove that birds have evolved from reptiles.
44.What are vestigial organs? On what basis do we say that the snakes have evolved from four footed animals?
45.How does the comparative study of embryos of different organisms support organic evolution? Explain by taking one example.
46.Name one organ analogous to the wing of bird. Why are they both analogous? Can you include the wing of bat also with them under the same category? Give reason.
47.Explain two palaeontological evidences in favour of organic evolution.
48.State the main points contained in Darwin’s theory of natural selection.
49.In humans, genetically the sex of the child is determined by the father and not by the mother, explain.
50.Presence of vestigeal organs in man supports the theory of organic evolution. How? Explain.
51.What is the significance of Archaeopteryx in the study of evolution?
52.Give two example of fossils records which support organic evolution.
53.Name any two vestigeal structures in human body. How do they give evidence for evolution?
54.Why is the wing of a bat said to be homologous to the wing of a bird and analogous to the wing of an insect?
55.How do embryological evidences reinforce the view that living organisms have evolved? Give one example from animals and one from plants.
56.What are autosomes? How many autosomes would be found in the normal cell of a normal human female?
57.What is a connecting link? Give one example.
58.How do vestigeal organs serve as an evidence of organic evolution?
59.Differentiate between homologous and analogous organs. Give one example of each.
60.Give any two reasons why Mendel selected pea for his experiments?
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