According to the endosymbiotic theory of the origin of eukaryotic cells, how did chloroplasts originate?   -by tertiary endosymbiosis -through secondary endosymbiosis -from the nuclear envelope folding outward and forming mitochondrial membranes -from infoldings of the plasma membrane, coupled with mutations of genes for oxygen-using metabolism -through primary endosymbiosis

According to Lynn Margulis's theory of endosymbiosis, bacteria entered large cells either as parasites or as undigested prey as illustrated. All the following are proof that mitochondria and chloroplast evolved from bacteria, except: Endosymbiosis in a nutshell: 1. Start with two 2. One bacterium engulfs the other. 3. One bacterium now lives inside the other. independent bacteria. 4. Both bacteria benefit from the arrangement. 5. The internal bacteria are passed on from generation to generation. O a they each have a double membrane they have chromosomes similar in shape to their host they are the size of bacteria their DNA is different from its host

Why is Alzhemier's disease the 6th leading cause of death in the United States right now?

Many of the organisms we learned about go through alternation of generations. Which of the following is true about alternation of generations? Group of answer choices Alternation of generations can result in separate haploid and diploid individuals Alternation of generations only involves mitosis Alternation of generations only happens in animals Alternation of generations results in hyphae forming a mycelium

In lecture, we discussed the endosymbiont theory that describes the evolutionary origins of mitochondria and chloroplast. A few scientists think that peroxisomes also have an endosymbiotic evolutionary origin, although most scientists disagree with this hypothesis. Which of the following hypothetical discoveries would provide support for the hypothesis that peroxisomes evolved from bacteria? Discovering that eukaryotic cells cannot live without peroxisomes. All of these hypothetical discoveries would provide support for the hypothesis that peroxisomes have an endosymbiotic evolutionary origin. Identifying the presence of DNA within peroxisomes. Determining that the majority of proteins in peroxisomes have eukaryotic origin.

What is endosymbiosis and why is it considered to be the source of eukaryotic diversity? Why are we confident this only happened once? What is primary and secondary endosymbiosis? Was there another endosymbiotic event that led to a third lineage? What group of organisms possesses a structure that might suggest this possibility and what is the structure? Why is the structure in question different from the ancestor of other plastids?