Sharks of the Cenozoic were largely filter feeders, despite their intimidating teeth! Platybeldon had very large narrow lower tusks that were used for fighting sharks. Megaldon sharks could technically eat mastodons. Shark jaws were huge, disproprotionately so, compared to their bodies.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

answer by yourhope:

answer is

human impact on the environment can be seen in the deterioration of the !

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he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?