Duration: 1 hour
Section A: Each Question Carries 1 Mark
Question 1: Define the term parasitism?
Question 2: If a double stranded DNA has 20 per cent of Guanine, calculate the percent of adenine in the DNA
Question 3: What is palindromic sequence?
Section B: Each Question Carries 2 Mark
Question 1: An angiospermic plant has 16 diploid numbers of chromosomes. Mention the number of chromosomes in antipodal cells and endosperm?
Question 2: What is triple fusion?
Question 3: What are sexually transmitted diseases (STDs)? How one could be free of these infections?
Question 4: What is vegetative propagation? Give an example?
Section C: Each Question Carries 3 Mark
Question 1: What is spermatogenesis? Briefly describe the process of spermatogenesis.
Question 2: India population is increasing drastically. Suggest various birth control methods to prevent population explosion?
Section D: Each Question Carries 4 Mark
Question 1: Define the following terms
a. Out breeding and inbreeding
b. Artificial insemination
d. Mutational breeding
Question 2: What is global warming? Describe the causes and effects of global warming? What are the essential measures need to be taken to prevent global warming?