Question

c)
Why is bleaching powder used in water treatment plants?
18
"It is a matter of chance whether a couple will have a boy or gin.
Justify the statement and support it with a neat illustration
OR
Briefly explain the role of natural selection and genetic drift in
speciation by citing an example.
19.
B
20
If you happen to touch a hot object, what would be your reaction?
With the help of a well labelled diagram explain how this response
happens
(a) Draw a neat labelled diagram of nephron and label on it: 3
(1) glomerulus
(ii) Tubule
(ii) collecting duct
(b) What is meant by excretion and osmoregulation?
For visually impaired, in lieu of Q.20
by Raphron
Describe double circulation in human beings. Why is it necessary?
num my diagram to show refraction through a rectangular glassgive me answer ​

Answer 1

Answer:

as it os good dehydrating agent