Class 12th Biology 2015 Set1 Delhi Board Paper Solution
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Q1 A geneticist interested in stud...
Q2 Name the transcriptionally active region of chromatin in a n...
Q3 State a reason for the increase...
Q4 Indiscrimate diagnostic practices using X-rays etc., should ...
Q5 What is Biopiracy ?
Q6 After a brief medical examinati...
Q7 Differentiate between male and female heterogamety.
Q8 How has mutation breeding helped in improving the production...
Q9 Mention a product of human welfare obtained with the help of...
Q10 Many fresh water animals can no...
Q11 Double fertilization is reporte...
Q12 Describe the process of Parturition in humans.
Q13 A teacher wants his/her students ...
Q14 (a) A DNA segment has a total o...
Q15 Explain adaptive radiation with the help of a suitable examp...
Q16 A team of students are preparin...
Q17 Enlist the steps involved in in...
Q18 Choose any three microbes, from the following which are suit...
Q19 Recombination DNA technolo...
Q20 Draw a labelled sketch of sparged-stirred-tank bioreactor. W...
Q21 Following the collision of two ...
Q22 Many plant and animal species a...
Q23 Since October 02, 2014 "Sw...
Q24 A flower of tomato plant follow...
Q25 Explain the genetic basis of bl...
Q26 "Analysis of age-pyramids ...
Question 15
Explain adaptive radiation with the help of a suitable example.
Answer
The process of evolution that starts from a single point and radiates in different directions is called adaptive radiation.
Example: Australian marsupials have evolved from a single ancestor and placental mammals exhibit similarities with their corresponding marsupials such as placental wolves and Tasmanian wolves.
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