This shouldn't be hard, but my brain is refusing to work on this question.

genetic engineering is used to scientists produce the hormone insulin.

a. false

b. true

i'd say that the moon rock is about 2.2 billion years old.

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.