The first life on earth, a simple, single-celled prokaryotic bacteria, appeared on life approximately how long ago? a) 4 thousand years b) 4 million years c) 4 billion years d) 4 trillion years

Put the following processes of protein synthesis in the correct order: - dna strands unwind and separate - mrna copies dna according to complimentary base pairing - trna's anticodons bring amino acids to the corresponding mrna codons - amino acids bind to each other making a protein - mrna leaves the nucleus - a stop codon is reached, the newly formed protein is released to go do its job for the cell

Cells destroy body cells infected by a virus or bacteria.

Aragonite shells of clams, snails, or scleractinian corals may be preserved unaltered in cenozoic deposits, but they are generally dissolved or recrystallized in older deposits. true or false