The answer is B,trust me I took the test.GOOD LUCK
You want about 500 calories a day extra.
Is caused by vibration, can travel through a vacum, and travels in longitudinal waves<span />
4 mps increase in 10 seconds = 2 mps increase in 5 seconds = .4meters/2sec
It is useful for an ecologist to identify the keystone species in an ecosystem because the keystone species is important to maintaining the stability of an ecosystem, and any changes in the keystone species population shows that there is changes in ecosystem health.
