Which zone contains the headwaters of a stream system? A. transition zone.
B. source zone.
C. floodplain zone.
D. delta zone.
E. littoral zone.

List two modern organisms that have pentameral symmetry

Identify the type of energy used in each action. the flexing of an arm muscle: a signal transduction process by a neuron: a ball at the top of a hill: 1. electrical energy 2. mechanical energy 3. gravitational potential energy

Asmall population of chimpanzees lives in a habitat thant undergoes no change for a long period of time. how will genetic drift affect this population