Home
Class 12
BIOLOGY
Amazon rainforests are considered as 'lu...

Amazon rainforests are considered as 'lungs of the planet' as they contribute______of the total oxygen in the earth's atmosphere.
(a) 10 %
(b) 15 %
(c) 20 %
(d) 30 %

A

`10%`

B

`15%`

C

`20%`

D

`30%`

Text Solution

Verified by Experts

The correct Answer is:
C

About `20%` of the world oxygen is produced in the amazon rainforests. They are described as the 'lungs of the planet because they provide the assential world environmental service of continously recycling `CO_(2)` into `O_(2)`.
Promotional Banner

Similar Questions

Explore conceptually related problems

A first order reaction is 20% complete in 10 min. Calculate the specific rate constant of the reaction and the time taken for the reaction for 75% completing.

In one n-p-n transistor the collector current is 10mA. If 90% of the electrons reach the collector then the emtter current (I_e) and the base current (I_b) are given respectively by

What percentage of the initial concentration of reactant is left in 2.0 h for a reaction whose rate constant is 4.25 xx 10^(-5)" s"^(-1) ?

A ballon partially filled with hydrogen at normal pressure and temperature is released from the ground . At 20 kilometer up in the atmosphere the temperature is - 40^@C and the pressure is 10 cm of mercury . Calculate the percentage increase in volume of the gas in the balloon.

Half-life period of a substance is 20 days. After 30 days what percentage of the substance will be left.

Mineral ion concentration in tissues that reduces the dry weight of tissues by about 10% is considered as

An elastic ball is dropped from a height of 100 m. Due to the earth, 20% of the energy is lost. To what height the ball will rise ?

The bulk modulus of a liquid is 2 xx 10^10 N/m^2 . What is the percentage decrease in the volume of the liquid , when the pressure is increased by 20 atmosphere > ( one atmosphere = 10^5 N /m^2 ).