Duckweed has been found to be a potential bio-fuel source that can be burned like gasoline for energy. In order to use the duckweed as a fuel source, a farmer harvests (uses) nearly all of the
duckweed from the pond ecosystem shown above. Predict the likely effects on the ecosystem

Look at the images of different rocks. which rocks have a fine-grained texture? check all that apply. 1 2 3 4 5

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?

Flock x flock y flock z total pieces of food eaten (from previous page) 147 93 60 food percentage* % % % simulated number of birds in flock for 3rd generation** * divide each flock's total pieces of food by 300, the total number of pieces of food eaten. ** multiply the food percentage for each flock by the total number of birds (30).