What is the function of calcium in skeletal muscles? a: it prevents the myosin head from binding with actin. b: it enables the myosin head to attach to actin. c: it provides energy for muscle relaxation. d: it triggers the myosin head to push the actin.

Gram-negative bacteria have a cell wall that is! and does not accept the stain, making itappear

Analyze how the water cycle affects a food web. now list 3 examples for each below using complete sentences, on how too much water would affect the same web? how about to little water?

Why are carbon dioxide concentrations expected to increase? a carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase b. carbon dioxide concentrations are expected to increase, because of an increase in agriculture. c.carbon dioxide concentrations are expected to increase, because more land will have to be cleared for increasing populations and agricultural use. d. all of the above select the best answer from the choices provided mark this and return save and exit next submit submit