Q: Answer this question:

how many colonies were in australia at the time of federation??

A: six

Q: Answer this question:

when did nickels stop being made of nickel??

A: 1942

Q: Answer this question:

name the type of enzyme used to produce the cdna??

A: reverse transcriptase

Q: Answer this question:

what are the two most abundant greenhouse gases in the earth's atmosphere??

A:
water vapor, carbon dioxide