The internal structures in the cells of prokaryotic organisms differ from those found in eukaryotic organisms. a bird is an example of a eukaryotic organism, while a bacterium is an example of a prokaryotic organism. photo by ken thomas photo by anlace which of the following structures can be found in a bird's cell, but not in a bacterium? dna cell membrane ribosomes organelles

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation:

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.