Study the given food chain below.
Grass → Insects → Frog → Snake → Eagle
The population of snake will increase if,
(i) The population of eagle decreases.
(ii) The population of frog increases.
(iii) The population of eagle increases.
(iv) The population of frog decreases.
A(i) and (iv)
B(ii) and (iii)
C(i) and (ii)
D(iii) and (iv)
Using the given hints, identify the option with correct
coal product and its use.
(1) Almost pure form of carbon.
(2) Mixture of about 200 substances.
A (1) - Coke, manufacture of steel
B (1) - Coal tar, manufacture of paints
C (2) - Coke, manufacture of plastics
D (2) - Coal tar, extraction of metals
In this, the answer is given (a) but it must not be (A) as coal tar is mixture of about 200 substances; not the coke. Am I right???
Which of the following statements are true and
(i) About 90% of the ozone in our atmosphere is contained in stratosphere.
(ii) The warmest parts of our atmosphere are located in mesosphere.
(iii) Trophosphere extends from Earth's surface upto 7 km at poles and 17-18 km at the equator.
(iv) The lowest part of thermosphere contains ionosphere.
(v) Hydrogen and helium are prime components of exosphere.
Identify processes X and Y from the given statements and select the option that correctly identifies the microorganisms involved in them respectively.
X : Conversion of complex organic compounds into ammonia
Y : Conversion of nitrates in soil to free nitrogen