If there was no CO2 in the earth’s atmosphere, the temperature of earth’s surface would be. CBSE1995

Related MCQs

• A. The atmospheric concentration of CO2 at which photosynthesis just compensation point. R. The CO2 compensation point is reached when the amount of CO2 uptake is less than that generated through respiration because the level of CO2 in the atmosphere is more than that required for achieving CO2 compensation point.
• When amount of CO2 taken from atmosphere (in photosynthesis) becomes equal to the amount of CO2 released in atmosphere (in respiration), this is called
• In sugarcane plant CO2 is fixed in malic acid, in which the enzyme that fixes CO2 is
• A. Under conditions of high light intensity and limited CO2 supply, photorespiration has a useful role in protecting the plants from photo-oxidative damage. R. If enough CO2 is not available to utilize light energy for carboxylation to proceed, the excess energy may not cause damage to plants.
• Match the appropriatc : Column – I Column – II A. Cosmozoan theory (i) Oxidizing environment rich in autotrophs like cyanobacteria B. Spontaneous generation (ii) Microspheres C. Primary abiogenesis (iii) Hot ball of gases D. Atmosphere I (iv) Oparin and Haldane E. Atmosphere III (v) Panspermia F. Sydney Fox (vi) Abiogenesis A B C D E F A B C D E F
• Name the natural phenomenon responsible for heating of earth’s surface and atmosphere?
• Which gas is responsible for increase in atmosphere temperature?
• Which of the following gas would disappear from the atmosphere if all the photosynthetic activities were to stop?
• The enzyme which fixes CO2 in C4 plant is [C.B.S.E. 2000]
• H2 CO3 is converted into CO2 and H2O with the help of an enzyme known as