Refer to the given diagram of human male reproductive system and select the incorrect statement regarding parts X, Y and Z.
AZ deposits sperms into the vagina of female during coitus.
BY is similar in function to ovaries of female
CX conducts sperms from testis to urethra.
DY lies within scrotum in the abdominal cavity.
Study the given table.
Identify P, Q, R and S and select the correct statement.
A P controls activity of other glands whereas R regulates sugar metabolism.
B Q regulates the metabolic rate whereas S controls the secondary male sexual characteristics.
C Q prepares the body to fight or run fast when needed whereas P is also known as the master gland.
D Both A and B
Which of the following statements are true?
(i) Cigarette smoke is a source of carbon monoxide.
(ii) Smog is a combination of smoke and fog which mainly contains CFCs.
(iii) Burning of coal releases fly ash.
(iv) Acid rain increases the pH of rivers and lakes.
A (i) and (ii)
B (i) and (iii)
C (ii) and (iv)
D (iii) and (iv)
Select the correct option which best suits the given descriptions for P, Q, R and S.
P - A simple tool used for removing weeds.
Q - A tool that is used for ploughing the field.
R - A tool that is used for sowing with the help of tractor.
S - A simple tool used for cutting of crops.
Which of the following will NOT cause environmental pollution?
AUsing fossils like coal, diesel and petrol more than CNG.
BDischarging wastes only into oceans and not into rivers or ponds.
CUsing less biodegradable materials than non-biodegradable materials.
DReducing the usage of chemical fertilizers and pesticides.