Endosymbiosis refers to the process in which prokaryotes live within eukaryote hosts. the endosymbiosis model of mitochondria and chloroplast evolution states that mitochondria and chloroplasts are derived from prokaryotes that were engulfed by eukaryotes or that entered eukaryotic cells as parasites. determine which three of the following statements describe evidence that supports the endosymbiosis model. check all that apply.
(a) modern examples of endosymbiosis exist, including bacteria that live in the guts of host insects.
(b) mitochondria and chloroplasts replicate by binary fission.
(c) mitochondrial and chloroplast dna is associated with histone proteins.
(d) mitochondria and chloroplasts have evolved to be smaller than their prokaryotic ancestors.
(e) prokaryotic ribosomes are similar in size to mitochondrial and chloroplast ribosomes.

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.

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.

carbon traps heat so more of it makes it hotter causing global warming. during the ice age carbon levels in the atmosphere were low so it got very cold. so the common things between them is carbon levels in the atmosphere.