The endosymbiotic theory to explain the origin of which structures?
mitochondria
ribosomes
nuclei
cell membranes
prokaryotic and eukaryotic cells
aye need here

The right answer is Mitochondria.

In the 20th century, scientists thought that plastids and mitochondria could come from procaryotes (bacteria). These would have been ingested by cells and live within them (in symbiosis). This endosymbiotic theory became perfectly plausible when it was discovered (in the 1950s and 1960s) that these organelles contained theori own DNA, tRNA and rRNA.

Answer : The correct answer is -

mitochondria.

Endosymbiotic theory is an evolutionary theory that describes the origin/evolution of eukaryotic structures, chloroplast and mitochondria from prokaryotic organisms. According to this theory, some bacteria (prokaryotic cell) were considered to live inside larger cells (that is in a symbiotic association). Later those bacteria became the part of larger cells and thought to evolve i to mitochondria and chloroplast, which are now the subcellular structures of eukaryotes.

Thus, mitochondria is the right answer for the question.

the answer is: trichonympha lives in the gut of termites and digests cellulose eaten by the termite.

this is an example of a symbiotic association of a protozoan with its mode of association.

hope i

-lavira: )

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."