The study of Escherichia coli (E. coli) led researchers to new experimental designs for studying operons. Which experimental design did the scientists use? Used a microscope to observe cell division to determine the structure of operons. Tested the response of E. coli to a variety of chemicals to determine the number of operons that are present. Inserted the operons from one organism into another to determine the mechanism of operon expression. Read the genome sequence to determine the quantity and organization of operons.

ok

explanation:

spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.