What does a catalase test indicate? What does a positive catalase test look like?

Match each stage of mitosis (lettered A-D) to its diagram shown in the figure below.

The smallest unit of evolution is the ______.

Based on the Darwinian Snails lab, if shell thickness is NOT heritable, how many generations of snails does it take before the crabs cause most snails to have very thick shells?

Based on the Darwinian Snails lab, Seeley showed that snails with thicker shells

Based on the Darwinian Snails lab, periwinkle snails living in New England 100 years ago had shells that were

Determine whether each of the following events is characteristic of mitosis, meiosis, or both.

The spicy heat of chili peppers is due to a chemical called capsaicin. A biologist gathered fruits wild chili plants in four isolated valleys (A, B, C, and D) and measured their spicy heat. The measurements (concentration of capsaicin) were as graphed as follows. Complete the statements below which refer to these graphs representing the four populations of chilies: According to the graphs (be sure to carefully look at the graphs, especially the axes values): Valley [a1] has the highest average spicy heat.  Valley [a2] has the most variation in spicy heat. Valley [a3] has the largest number of chilies.

A student decides to play the Darwinian Snails lab against the rules and eat both the thickest and thinnest shelled snails equally, with all assumptions of natural selection on (thickness is variable and heritable). After a few generations, the snails will likely

Which of the following is TRUE regarding the mitotic phase of the cell cycle?