In animal cells, are important for cell division and reproduction because they organize the spindle upon which the cell's chromosomes are pulled apart.
A) vacuoles
B) lysosomes
C) centrioles
D) ribosomes

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Choose the molecule that is described by each phrase. energy used during long activities:

Connection compare and contrast genetic engineering to the process of natural selection. select all statements that are true.

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen