Time: 3 hours 15 minutes
Full Marks:90
Group -A
(Answer to all questions)
1. Write the answer in complete sentence by choosing the correct answer for each question will respectively serial number: 1x15
1.1) The gland which according to you is known as master gland is:
A) pituitary B) adrenal C) pancreas D) thyroid
1.2) which of the following breaks dormancy and causes germination of seed--
A) Auxin B) Gibberellin C) Cytokinin D) Ethylene
1.3. Select from the following the number of cranial nerves present in human beings--
A)10 pairs B) 12 pairs C) 24 pairs D) 31 pairs
1.4. The name of the sugar present in DNA is--
A) Ribose B) Pentose C) Deoxyribose D) glucose
1.5. The type of asexual reproduction found in planeria is
A) Fragmentation B) Spore production C) regeneration D) budding
1.6. A person is passing through the period between childhood and maturity. Choose the time period he is passing through--
A) 10-19 years B) 15-25 years C) 13-19 years D) 25-35 years
1.7. He performed experiments on heredity and is known as father of genetics. He is
A) Lamarck B) Darwin C) Mendel D) Johanson
1.8. Deduce the type of gametes that could be formed from YyRr--
A) 3 types B) 4 types C) 5 types D) 2 types
1.9. A boy can roll his tongue while another boy can not. They are each others--
A) variations B) locus C) characters D) genotype
1.10. Identify the oldest fossil of horse from the following--
A) Pliohippus B) Merychippus C) Mesohippus D) Eohippus
1.11. The present in fish that helps to maintain buoyancy is--
A) gill B) swim bladder C) tailfin D) thoracic fin
1.12. the theory "Struggle for existence" was proposed by
A) Lamarck B) Hugo-De-Vris C) Weismann D) Darwin
1.13. the nitrogen fixing bacteria which is present symbiotically in roor or leguminous plant is-
A) Azotobacter B) Clostridium C) rhizobium D) nitrobactor
1.14. you have visited a hotspot in india where you find one-horned rhino. you have visited
A) sundaland B) western ghats and lanka C) Indo-Burma D) Eastern Himalayas
1.15. The chemical used in Cryporeservation is
A) liquid oxygen B) liquid nitrogen C) liquid carbondioxide E) liquid methane
Group - B
2. Answer any 21 questions of 26 questions given below as instructed. 1x 21= 21
Fill in the blanks with proper words in the following sentences (any five):. 1x5= 5
2.1. the three layers covering of human brain is called___
2.2. the unit of asexual reproduction is____
2.3. The importance of ____ chromosome is maximum to determine the sex of human being.
2.4. The theory of origin of new organ to meet the demand is the opinion put forward by____
2.5. ___ is a disease you will find in an area suffering from water pollution.
2.6. The Asian lion can be found in the ____sanctuary of Gujarat.
Decide whether the following statements are true or false (any five). 1x5= 5
2.7. Insufficient release of STH can make a child dwarf.
2.8. In cross pollination there is no need of carrier.
2.9. when a pure tall and a pure dwarf plant are crossed then the offspring produced is a hybrid.
2.10. Cactus could survive without water at a stretch in the hot desert conditions.
2.11 Chewing of tobacco can lead to asthma.
2.12. A high intensed sound can cause damage to our digestive tract.
Match the words and rewrite the correct pair mentioning the serial number of both the columns. (Only five):. 5x1= 5
Column A
2.13. Amoeba
2.14. DNA
2.15. Incomplete dominance
2.16. Bee dance
2.17. greenhouse gas
2.18. Meiotic cell division
Column B
a) carbon dioxide
b) Pseudopodia
c) evening glory
d) crossing over
e) communication
f) Singlila
g) Double stranded
Answer in a single word or in a single sentences (any 6):. 1x6=6
2.19 choose the odd one and write it:
Oxytocin, Prolactin, Follicle Stimulating Hormone, Luteinising hormone.
2.20. A plant hormone acts as chemical messenger. "explain the statement.
2.21. A pair of related terms is given below. On the basis of the relationship in the first pair write the suitable word in the gap of the second pair.
Planaria: regeneration:: Yeast: __
2.22. In guineapig, black fur is dominant over white fur, Suggest what would be the probable genotype of a white guineapig.
2.23. Deduce what happens when male gametes(22A + X) fuses with female gamete.
2.24. Name the organs whose origin are same but they function differently.
2.25. There is a industry near a locality sending out smoke. Write the name of a disease that can spread in the locality because of it.
2.26. An alkaloid obtained from a particular plant is used to reduce the high blood pressure. Recollect the name of that plant and write it.
Group-C
3. Answer any 12 questions in 2- 3 sentences out of 17 questions given below. 2x12= 24
3.1. you are concentrating upon your studies when suddenly an intense torch light flashes upon your eyes. Explain your reaction and the mechanism behind it.
3.2. Discuss about the pituitary gland on the basis of following points--
• location
• Two major divisions
3.3. A bird is flying in sky. Explain how its feathers, the remiges and the rectices are helping in its action.
3.4. Why does a plant acquire bushy appearance well its terminal end is nipped off regularly? explain this with the role of plant hormone.
3.5. Differentiate between sexual and asexual reproduction on the basis of the following points--
• number of parental organisms required.
• nature of offsprings produced.
3.6. justify what may happen if the cell cycle does not take place properly.
3.7. why is alteration of generation important in ferns.
3.8. you are given a tall pea plant bearing violet flowers. Deduce the probable genotype of the pea plant.
3.9. with the help of a cross calculate the percentage of normal children produced from a colour blind carrier mother and a normal father.
3.10. Recall and write the phenotype and genotype ratio of F² generation of a cross between a pure yellow round seeded pea plant with a pure green-wrinkled seeded pea plant.
3.11. Discuss the role of air sac in the adaptation of pigeon.
3.12. Recall the names of the gases used in Miller and Urey's experiment and write down the ratio in which they were used.
3.13. Justify with two reasons how modern horse has gradually evolved from its forerunners.
3.14. why is Ammonification considered to be an important stage in nitrogen cycle ?
3.15. Why is sundarban called biosphere reserve ?
3.16. write two problems due to population explosion in your city.
3.17. write two difference between in-situ and ex-situ conversation on the basis of
• place of conservation
• access of public
Group- D
Write the six questions on their alternatives given below. The mark allotted for each question is 5(the division of marks is either 3 + 2, 2 + 3 or 5)
4. Answer 6 questions or there alternatives given below: 5x6= 30
4.1. Draw this structural and functional unit nervous system and label. 3+2= 5
A) Dendron B) node of Ranvier C) Schwann cells D) Axon Hillock
OR
Draw the Anaphase stage of animal cell division and label the following parts --
A) centrosome B) chromosomal spindle fibres C) continuous spindle fibre D) Chromatid.
4.2. A baby is born a few days ago. Discuss the phases of growth taking place in its body. Mention which part of a flower develop into a fruit which part in to seed after fertilization takes place. 3+2= 5
OR
You have brought a rose twig from your friend's house and planted it in your garden. Discuss the method you have adopted and why?
How will you differentiate between the cell division of a somatic cell and a reproductive mother cell on the basis of --
• nature of chromosome division
• number of daughter cells produced.
4.3 With the help of checker board and showing cross upto F² generation examplify how Mendel deduced his first law. State the law. 3+2= 5
OR
Differentiate between Thalassemia and and beyond haemophilia on the basis of the following points--
• type of chromosomes affected.
• symptom
Discuss what should be done to prevent birth of more children suffering from genetic diseases and how can you do it ? 2+3=5
4.4. How does camel dehydration in the desert condition ? discuss the psychological adaptation of sundari in the salt water condition. 3+2= 5
OR
Discuss how wings of bat and birds indicate convergent evolution. there is a garbage dumping station at a place. Discuss what types of struggle for existence you may find there.
4.5. what is the need of conservation in in today's world ? you have recently visited a sanctuary Write two characteristic features you find typical to it. 3+2= 5
OR
you live near the airport area. Deduce what pollution you face every day and what are its effect on your body.
4.6. what criteria should you take in to account to declare a place a hotspot ? you have been invited to deliver a speech in an awareness programme on Lung cancer. Discuss what you must include in your speech. 3+2= 5
OR
list up the reasons behind the reduction in number of tigers in a forest. what steps should you take to overcome this?
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