(i) There are a total of 26 questions and five sections in the question paper, All questions are compulsory.
(ii) Section A contains question number 1 to 5, Very Short Answer type questions of one mark each.
(iii) Section B contains question number 6 to 10, Short Answer type I questions of two marks each.
(iv) Section C contains question number 11 to 22, Short Answer type II questions of three marks each.
(v) Section D contains question number 23, Value Based Question of four marks.
(vi) Section E contains question number 24 to 26, Long Answer type questions of five marks each.
(vii) There is no overall choice in the question paper, however, an internal choice is provided in one question of two marks, one question of three marks and all three questions of five marks. An examinee is to attempt any one of the questions out of the two given in the question paper with the same question number.
- Q1VIEW SOLUTION
- Q2VIEW SOLUTION
- Q3VIEW SOLUTION
- Q4VIEW SOLUTION
Rearrange the human activities mentioned below as per the order in which they developed after the modern Homo sapiens came into existence during ice age: (1)VIEW SOLUTION
(i) Human settlement
(ii) Prehistoric cave art
- Q6VIEW SOLUTION
- Q7VIEW SOLUTION
Describe the structure of a nucleosome. (2)
Mention the evolutionary significance of the following organisms :
(c) Homo habilis
(d) Homo erectus VIEW SOLUTION
- Q10VIEW SOLUTION
- Q8VIEW SOLUTION
- Q11VIEW SOLUTION
- Q12VIEW SOLUTION
- Q13VIEW SOLUTION
- Q14VIEW SOLUTION
- Q15VIEW SOLUTION
- Q16VIEW SOLUTION
- Q17VIEW SOLUTION
- Q18VIEW SOLUTION
- Q19VIEW SOLUTION
- Q20VIEW SOLUTION
'in-situ' Conservation can help endangered/threatened species. Justify the statement. (3)Name and describe any three causes of bio-diversity losses. VIEW SOLUTION
- Q22VIEW SOLUTION
Public all over India is very much concerned about the deteriorating air quality in large parts of North India. Alarmed by this situation the Resident's Welfare Association of your locality organized an awareness programme entitled "Bury not burn". They invited you, being a biology student to participate. (4)VIEW SOLUTION
(a) How would you justify your arguments that promote burying and discourage burning? (Give two reasons)
(b) With the help of flow charts, one for each practice depict the chain of events that follow.
State and explain the "law of independent assortment" in a typical Mendelian dihybrid cross. (5)
(a) How do the observations made during moth collection in pre- and post- industrialized era in England support evolution by Natural Selection?VIEW SOLUTION
(b) Explain the phenomenon that is well represented by Darwin's finches other than natural selection.
(a) What is an age-pyramid?
(b) Name three representative kinds of age-pyramids for human population and list the characteristics for each one of them.
Discuss the role of healthy ecosystem services as a pre-requisite for a wide range of economic, environmental and aesthetic goods and services. VIEW SOLUTION
(a) A capsicum flower has 240 ovules in its ovary. But, it produces a fruit with only 180 viable seeds. (5)
Explain giving a reason that could be responsible for such a result.
(b) Describe the development of an endosperm in a viable seed. Why does endosperm development precedes embryo development?
(c) Give an example of an angiosperm seed that has a perisperm. Name the part the perisperm develops from.
a) Where in the fallopian tube does fertilization occur in humans? Describe the development of a fertilized ovum upto implantation.
b) How is polyspermy prevented in humans? VIEW SOLUTION
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