What is the central support structure of a plant

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).

One gene can influence trait(s). one trait can be determined by gene(s).

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?