Human activities, such as overhunting and destruction of habitat, once caused sudden drops in populations of animals like buttalo and elephant seals. Which term describes what happens to these populations genetically?

A)bottleneck
B)founding
C)diversity
D)allelic frequency

If someone could do the first couple, just so i can see how it's done that would be great! 20 points. complete a dichotomous key for the 10 leaves on the common leaves sheet. the chart provided here allows for 11 pairs of statements. depending on how you build your dichotomous key, you may or may not need all of them, or you may need to add some.

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.

Which of the following is the source of energy for photosynthesis? a.) glucose b.) chlorophyll c.) carbon dioxide d.) sunlight