The following genes have the following sequences of nucleotides. From left to right write the sequence of the mRNA molecule transcribed from them. GACATTTA

GATTACA



ATTGGCCA

AAAGGGCT

GGGCCTTA

CCCTTTAAA

TT

Why is it important that human chromosomes have many origins of replication

Out of the seven main animal groups (fish, mammals, birds, insects, reptiles, amphibians, and arachnids), how many contain members with internal backbones? a. 5 b. 3 c. 7 d. 1

List the advantages and disadavantages of the switch from persistent chlorinated hydrocarbon pesticides (such as ddt) to nonpersistent organophosphate pesicides. have the benefits of the switch outweighed the disadvantages? explain.