why doesn't food chains actually exists in nature but food webs do, in more than half a page give reasons pls​

it means

miss jennifer is buying pencils in packs of 12, notebooks in packs of 16, and red pens in boxes of 20. she needs to have the same number of pencils, notebooks, and red pens. how many packs of each type should she buy?

answer mine : )

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?

mass and weight are closely related because mass affects the weight of an object experiencing the effects of gravity. weight is the measure of the force of gravity on an objects's mass, while mass is the measure of how much matter there is in an object.