18. how do archaea and bacteria differ?
a. archaea can exist as multicellular organisms, while bacteria are unicellular.
b. archaea are eukaryotes, and bacteria are prokaryotes.
c. archaea can live in environments with extreme conditions such as temperature, while bacteria can't.
d. archaea use rna as their genetic material, while bacteria use dna.

C. Archaea can live in environments with extreme conditions such as temperature, while bacteria can't.

Explanation:

Archaea are capable of surviving under the extreme condition and so are considered as extremophiles.

However bacteria are more suited towards mild climates and would die in extreme conditions

Archaea are found in unusual environments like in hot springs, ocean depths, salt brines, while bacteria are found everywhere like in the soil, water, living and non-living organisms.

c archaea can live in environment with extreme conditions such as temperature, while bacteria can't.

Explanation:

prism b but im not for sure

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products