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which prokaryotic organism shows up as the earliest fossils?

a) archaea

b) echinoderms

c) algae

d) cyanobacteria

Why was the sample heated in step 5? describe the chemical principles involved in the reasoning behind this step?

Assume that a student is given two different models of bacteria, with one model consisting of big bacteria and the other consisting of small bacteria. how can the student demonstate the theory of endosymbiosis using the models

Abnormal softening of a gland is known as