The Jammu and Kashmir State Board of School Education formally known as JKSBSE or JK SBOSE) is the official board of school education in the Indian state of Jammu and Kashmir. It is based in Jammu & Srinagar and is an autonomous education body under the administration of the state government of J&K. The board gives affiliation to more than 10K schools across the state and employs more than 22K teachers.
The board is engaged to determine the courses of direction and make syllabi for them, and to choose reading material for the elementary, and secondary schools and for the higher secondary (school degree) school examinations; to lead open examinations and publish the results at the secondary school and higher secondary levels; to concede diplomas or certficates/endorsements to individuals who have passed its examinations; to perceive instructive foundations at the auxiliary school and higher optional levels, and direct reviews of perceived establishments, guaranteeing that required encourages, hardware, and staff are set up, that exclusive the affirmed books and courses are instructed, and that the measures are as per the significant directions; to expel acknowledgment from schools that don’t meet the correct conditions; to administer and control the perceived organizations; and exercise different forces given to it by law.
JKBose 12th Class Botany/Biology 2017 Paper Jammu
(Long answer type questions)
Q1. What are the two types of desirable approaches to conserve biodiversity? Explain with examples bringing out the differences between the two types.
(a). Explain the significance of ecological pyramids with the help of examples.
(b). Why are pyramids referred to as upright or inverted? Explain.
Q2. (a). Draw a labeled diagram of “replication fork” showing polarity. Why does DNA replication occur within such ‘forks’?
(b). Name two enzymes involved in the process of DNA replication along with their properties.
Explain in detail chromosomal theory of inheritance.
(Short Answer Type Questions)
- Explain pollen-pistil interaction in detail.
- With the help of one example explain the phenomenon of codominance and multiple allelism.
- Differentiate between parasitism and competition giving one example of each. State the common character they share.
- How is ozone layer being depleted and brief explain effects of ozone depletion?
(Very Short Answer Type Questions)
Q1. Which is a triploid tissue in fertilized ovule? How is the triploid condition being achieved ?
Q2. List Three strategies that bisexual chasmogamous flower can evolve to prevent self-pollination.
Q3. Briefly discuss the role of plant breeding to improved food production.
Q4. Explain the following :
(Objective Type Questions)
(i) Bt in Bt cotton signifies biotechnology. (True/False)
(ii) Removal of male part in flower is ……………….
(iii) Spirullina is :
(c) Edible fungus
(d) Single cell protein
(iv) SO2 pollution damages :
(b) Golgi bodies
(v) Phenotypic ratio of monohybrid F2 progeny af an incomplete dominance is :
(a) 1 : 1 : 1 : 1
(b) 1 : 2 : 1
(c) 3 : 1
(d) 2 :1 : 1
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