Home
Class 12
BIOLOGY
If you go back in the history approx. 45...

If you go back in the history approx. 4500 million years back when atmosphere was reducing the organism were

A

Autotroph, aerobic

B

Chemo-autotroph, anaerobic

C

Chemo-heterotroph, anaerobic

D

Heterotroph, anaerobic

Text Solution

Verified by Experts

The correct Answer is:
C

The first organism to be evolved was anerobic as earlier atmosphere was reducing type and they synthesise their own food by the use of organic chemicals.
Promotional Banner

Similar Questions

Explore conceptually related problems

Presence of a single supercontinent on earth some 250 million years back was proposed by

75% of the Solar Energy reaching Earth is absorbed by earth's surface which increases its temperature.The reat of heat rediates back to the atmosphere. Some of the heat is trapped by gases such as CO_(2), CH_(4), O_(3), CFCS present in atmosphere. They add to the heating of atmosphere which causes 'Global Warming'. Answer the following questions on the basis of above paragraph : (i)What is Green House effect ? (ii)What can we do to reduce the rate of Global Warming ?

When a tan stasrts, the head of a standing passenger seems to be pushed backward. Analyse the situation from the ground frame. Does it really go backward? Coming back to the train frame, how do you explain the backward movement of the head on the basis of Newton's laws?

Two moles of a certain ideal gas at 300K were cooled at constant volume so that the pressure was reduced to half t he initial value. Then, as a result of heating at constant pressure, the gas expanded till its temperature got back ot the initial value. Find the total amount of heat absorbed by the gas in the process.

Two moles of a certain gas at a temperature T_0=300K were cooled isochorically so that the pressure of the gas got reduced 2 times. Then as a result of isobaric process, the gas is allowed to expand till its temperature got back to the initial value. Find the total amount of heat absorbed by gas in this process.