Because, photoautotrophs serves as their carbon sources.
Chemoheterotrophic bacteria are those bacteria that are incapable of producing their own food, they depend on photoautotrophs, which are capable of making their own food by trapping energy from the sun. Thus, photoautotrophs serves as source of food for the chemoheterotrophic bacteria.
Clay because it’s a mixture of dirt and runoff/water
I think it may be this but not quite sure
Lipids are primarily hydrophobic in nature, but there are a large variety of lipids such as fatty acids, mono-, di-, and triglycerides, for example (check wikipedia for more examples).
<span>Proteins are polymers of amino acids. </span>
<span>Nucleic acids are polymers of nucleotides.</span>
A) is your best answer.
Relative Dating gives the 'relative dating', which allows one to find the difference of age between many different of fossils. However, radioactive dating is used to get a more exact measurement of a fossil, but it can only be used for certain types of fossils.
hope this helps
