Answer:
The correct option is D. Chemoautotroph uses CO2 for carbon and H2 for energy.
Explanation:
Autotrophs can be described as organisms that are capable of making their own food. There are two types of autotrophs: photoautotrophs which use energy from the sunlight to produce food and chemoautotrophs have the ability to make biological compounds from inorganic matter.
The chemoautotrophs are capable of taking carbon from inorganic sources and converting them into useful organic compounds. They are also capable of taking hydrogen atoms and use them for deriving energy. Hence, D is the correct answer.
A tolerance curve is the range of conditions which show how
an organism can live and function. It is a graph that will show the organism’s
activity in certain environmental conditions. There are different species all
over the world and each of them has certain environmental conditions which it
can best survive and reproduce. These are the conditions which the species has
best adapted. These conditions may include physical factors in the area such as
temperature, humidity, soil chemistry, pH, salinity and oxygen levels.
The oldest type of bacteria is over 3 million years old I think. It comes from the cyanobacteria family! The bacteria is a type of algae! Discovered by Gregorio V. in the Late 1900's.
