An organism’s characteristics, or traits, are due to genes. Different versions of genes create different traits. What are these different versions of genes called?

Select one:
a. DNA
b. alleles
c. gametes
d. chromosomes

If bacteria are much too small to see, what is one reason why can we see colonies in the petri dishes that have plenty of food to eat after only a few days?

Select the correct answer from each drop-down menu proteins are

19. a cell is viewed under a microscope and is found to have two nuclear envelopes and spindles that appear to be breaking apart. which phase of mitosis is the cell most likely in? a. metaphase b. prophase c. telophase d. anaphase