The answer is 'Cambrian' explosion. This took place approximately 541 million years ago. 'Explosion' refers to the evolution of a large range of new major animal phyla. Scientists know this by the large number of diverse fossils from this period. Prior to this period, organisms were single-celled, but over the Cambrian Explosion, lasting about 80 million years, life forms diversified rapidly to resemble the life forms existing today.
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Answer:
Finger prints, hair, body fluids( blood, saliva, semen), bone.
Explanation:
Answer: Positive charge of 1
Explanation: This is because it is believed that it is from the charge of the quarks that make up the nucleons which are protons and neutrons.
Answer:
the cytoplasm is negative and extracellular fluid is positive because of the unequal distribuation of anions and cations on both sides.
Explanation: