What happened at the end of the Mesozoic era, but did not happen at the end of the Paleozoic era?
A. An ice age occurred.
B. There were major asteroid impacts.
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C. A supercontinent broke up.
D. There were mass extinctions.

During which phase does earth see more than half of the moon's surface? 1)first quarter2)third quarter3)waxing gibbous4)waning crescent

Explain why biological control methods are generally environmentally superior to chemical pest control methods.

Label the steps for protein synthesis in order, beginning with the first steponce the protein is made, the gene for a particular trait is expressedmrna joins the ribosome, and the anticodons from trna join mrna to form a chain ofamino acidsrna polymerase unzips dna and free rna nucleotides join dna to form mrnav a chain of amino acids is formed from peptide bonds, creating a proteinmrna is transported from the nucleus of the cell to the ribosomes of the cell.