Q13 of 43 Page 1

(a) Differentiate between benign and malignant tumours.

(b) Why is colostrum a boon to the new born baby?


(a)



(b) Colostrum is a yellowish fluid secreted by mother’s milk during initial days of lactation. The Colostrum have IgA antibodies in abundant quantity. This IgA protect the infant. Colostrum provides immunity (resistance) to new born baby. Hence Colostrum is a boon to the new born baby. Colustrum provides passive immunity to the infants. It protects infants from various infections.


More from this chapter

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11

Mention the cause of ADA deficiency in humans. How has genetic engineering helped patients suffering from it?

 12

Drinking water problem in our urban areas is caused mainly because we fail to protect our water bodies. Explain how accelerated eutrophication chokes our water bodies to death.

 14


This diagram above shows a part of the human female reproductive system.


(a) Name the gamete cells that would be present in ‘X’ if taken from a newborn baby.
(b) Name ‘Y’ and write its function.


(c) Name ‘Z’ and write the events that take place here.


 15

How does the study of fossils support evolution? Explain.

OR


What does Hardy-Weinberg Principle of equilibrium indicate? List any two factors that could alter the equilibrium. What would such an alteration lead to?