What is the range of h. erectus brain size? 1,000-1,500 cc 700-1,200 cc 900-1,200 cc 700-900 cc

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

b. lithosphere, asthenosphere, mesosphere   is the answer most likely

the electromagnetic energy from the sun arrives in the form of visible and invisible light.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.