According to the endosymbiotic theory of the origin of eukaryotic cells, how did mitochondria originate? From engulfed, originally free-living bacteria
When a protoeukaryote engaged in a symbiotic relationship with a protocell by secondary endosymbiosis
From the nuclear envelope folding outward and forming mitochondrial membranes
From infoldings of the plasma membrane, coupled with mutations of genes for proteins in energy-transfer reactions

1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.

Which are reasons cells undergo cell division?

Read the article and use the information to answer the following questions. active transport in active transport, molecules are moved across the cell membrane with the of neurons electrical impulses proteins. inhibitors 3 of 3 vity