A cell membrane is semi-permeable. What does that mean? Select one:
a. It lets things in, but not out of the cell.
b. It let things out, but not into the cell.
c. It Lets certain things in and certain things out of the cell

The negative impacts of nonnative species generally outweigh the positive impacts

Select the correct answer from each drop-down menu. which phase of mitotic division is the highlighted cell undergoing? the cell is undergoing , which is the stage before .

3. in the fruit fly, recessive mutation brown, b, causes brown color of the eye and absence of red pigment. recessive mutation p of another independent gene causes purple color of the eye and absence of brown pigment. the cross of a brown-eyed female and purple-eyed male produced wild type eyes. what will be the colors and their ratio in f2?