Sexual reproduction relies on two different sexes (female & male) because one has the egg and the other has the sperm.
Archaea<span> have more complex RNA polymerases than </span>Bacteria<span>, similar to Eucarya. Unlike </span>bacteria<span>, </span>archaea<span> cell walls do not contain peptidoglycan. </span>Archaea<span> have </span>different<span> membrane lipid bonding from </span>bacteria<span> and eukarya. There are genetic </span>differences<span>.</span>
The answer is 'Cambrian' explosion. This took place approximately 541 million years ago. 'Explosion' refers to the evolution of a large range of new major animal phyla. Scientists know this by the large number of diverse fossils from this period. Prior to this period, organisms were single-celled, but over the Cambrian Explosion, lasting about 80 million years, life forms diversified rapidly to resemble the life forms existing today.
Answer:
it depends what kind of energy your taking about, like human energy or nonrenewable energy. If it is human energy then the option c, but if it is nonrenewable energy than b.
Explanation:
the other options aren't very logical
