What well known process was important in developing both mendel's and
darwin's ideas?

a. cloning
b. cross-pollination
c. artificial selection
d. spontaneous generation

What must happen before meiosis can begin? a. four gametes must be produced b. the four tetrads must be pulled apart c. dna doubles and produces sister chromatids d. the cell membrane pinches together

Which geologic feature would most likely be represented by contour lines john far apart from one another? a cliff a hill a plain a valley

The cluster of developing cells from conception until birth is called an