What can you say about these
forces?
a. the drag and weight forces are
balanced with the thrust force.
b. the drag and weight forces are
unbalanced with the thrust force.
c. the drag and weight forces are the
same as the thrust force.

i think that d. wind is the answer.   i missed the question when i answered a. currents.

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.

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link: