Soil pollution involves the following
processes except
accumulation of non-
biodegradable materials.
alteration of the soil chemical
composition.
deposition of solid waste.
recycling of biodegradable
materials.
toxification of soil by
chemicals.

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).

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.

The idea that all living things are made up of cells is considered scientific law. this means the idea is an emerging scientific idea that has a logical explanation. has been tested with similar results at least twice. is supported by scientific consensus and a large amount of evidence. has been rejected only once by the scientific community