Biology:2005:CBSE:[All India ]:Set-II
To Access the full content, Please Purchase
-
Q1
Why does thinning of bones usually start occurring in human females at about 50 years of age? Marks:1View AnswerAnswer:
Thinning of bones usually start occuring in human females at about 50 years of age due to the decreased levels of estrogen in the female body. Decreased bone mass and increased chances of fracture are the prominent symptoms of osteoporosis. -
Q2
What is a model in mimicry? Marks:1View AnswerAnswer:
Out of syllabus -
Q3
Why is Hydra said to be virtually immortal? Marks:1View AnswerAnswer:
Out of syllabus -
Q4
What is the total number of bones present in the left pectoral girdle and the left arm respectively in a normal human ? Marks:1View AnswerAnswer:
In a normal human, left pectoral girdle is formed of two bones and left arm is composed of 30 bones. -
Q5
How does Colchicine induce polyploidy? Marks:1View AnswerAnswer:
Out of syllabus -
Q6
What is oxidative decarboxylation? What happens to pyruvate immediately after this reaction? Name the enzyme involed in this reaction. Marks:2View AnswerAnswer:
Out of syllabus -
Q7
Which animals suffer from Rinderpest? Give its two early symptoms and explain how it spreads. Marks:2View AnswerAnswer:
Out of syllabus -
Q8
Explain symbiotic nitrogen fixation in leguminous plants. Marks:2View AnswerAnswer:
Out of syllabus -
Q9
What is accretionary growth? Give one example. Marks:2View AnswerAnswer:
Out of syllabus -
Q10
What is a transgenic crop? Which plant is used to produce blood anti-coagulant protein? What is this protein called? Marks:2View AnswerAnswer:
A crop that contains one or more foreign gene and expresses it/them is called a transgenic crop.
Brassica napus is the crop that produces the protein Hirudin.
