The first organism on earth were _______________?

A. autotrophs
B. heterotrophs
C. saprotrophs
D. none of these

Submitted by: Athar Ali

The first organisms on Earth were most likely heterotrophs. These early life forms would have consumed organic molecules from their environment to obtain energy and nutrients for survival, as opposed to producing their own food through processes like photosynthesis (autotrophs) or decomposing organic matter (saprotrophs). So, the correct answer is B. heterotrophs.

Related Mcqs:

The bodyguard of the Earth is __________ that save the Earth from many Comets and Asteroids.
A. Mars
B. Saturn
C. Uranus
D. Jupiter
About 50% of the Earth’s crust, including the waters on the Earth and atmosphere, is?
A. Oxygen
B. Cabon Dioxide
C. Silicon
D. Clay
The instrument which i specially design for recording earth quake wave is called seismograph which measure earth quake waves on a ____________?
A. Diatonic scale
B. Fahrenheit Scale
C. Richter scale
D. Celsius Scale
E. None of these
The lowest region of the earth’s atmosphere comes between the earth and stratosphere. what is this region’s name?
A. Ionosphere
B. Troposphere
C. Stratosphere
D. Mesosphere

Submitted by: Ashfaque Ali Khoso
In the Composition of the earth, Aluminum is _______________?
A. 27.5%
B. 20.3%
C. 14.5%
D. 8.23%

Submitted by: Mansoor Ul Haque
The dominant phase of life cycle in these organism is haploid?
A. Mosses
B. Bacteria
C. Protozoa
D. None
Which term describes the emission of light by a living organism?
A. Natural light
B. Bioluminescence
C. Illumination
D. Mimicry

Submitted by: Ashfaque Ali Khoso
A satellite moving round the earth with a uniform speed has____________?
A. An accelerated motion
B. No acceleration at all
C. Uniform acceleration
D. Uneven acceleration
The movement of earth around sun brings ________?
A. Tornadoes
B. Rainfall
C. Seasons
D. Earthquakes

Submitted by: Junaid Abbas
Exosphere interacts with ___________ of Earth at roughly distance of 10,000 km.
A. Electrosphere
B. Magnetosphere
C. Spectrosphere
D. Echosphere

Submitted by: Muhammad Abdullah