Why do we use arrows when creating a food web? what do they represent?

Dna is always read in the whereas rna is read in .

Why do bacteria thrive even in hostile environments

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).