The answer is <span>A)mitochondria
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<span>The endosymbiotic theory explains that mitochondria and chloroplasts descended from the same type of bacteria. Symbiosis is an interaction between two organisms of different species, and endosymbiosis is a type of symbiosis in which one organism lives inside the other one. According to the endosymbiotic theory, a host cell ingested symbiotic bacteria, which specialised into mitochondria or chloroplasts. The evidence for this theory is that mitochondria and chloroplasts, like bacteria, have their own circular DNA. and They also have their own transcriptional and translational machinery.</span>
Nn siginifys a heterozygous genotype
Enzymes are in our bodies to speed up reactions etc. If there were no enzymes, then our bodies would act very slowly to reactions.
idk a person that does science
Different structure in an organism are specialized to perform different tasks in the organism depending on their makeup. A few examples are:
Heart, veins, arteries are structures forming the cardiovascular system and function is to facilitate transport nutrients and oxygen carried by blood all over the body.
Bones, joints, ligaments and cartilage are structures of the skeletal system and their function is support and protection of the body.
Mouth, esophagus. stomach, large and small intestines are structures of the digestive system and their function is to break down food and absorb nutrients.
