What is the primary cause that drives the ocean conveyor belt, also referred to as thermohaline circulation? O water density

O tides

O water pressure

O winds

What are examples of pullotion that can result from mining operations?

O mercury and cyanide

O pesticides and fertilizer

O Salt and petroleum

O Soil and sediment

By what process in the water cycle does water return to the land.

O transpiration

O sublimation

O evaporation

O precipitation

the answer is 95 degrees

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.

the answer is: the „power stroke“ step.

muscle contraction can be divided into a few steps:

1. the release of ach (acetylcholine) in the synaptic cleft, binding of ach for its receptor and consequently opening of the ca channels.

2. the release of ca, binding of ca for the troponin

3. troponin shifting the tropomyosin, which was blocking the active site on the actin

4. myosin heads attaching to actin by breaking down atp to adp+ pi

5.   formation of the ‘cross-bridge’ on the active site of the actin filament by myosin head

6. “power stroke” -the cross bridge pulls actin, which slides over the myosin

9.     7. the release of adp completes the cross-bridge movement and atp attaches to myosin, breaking the actin-myosin cross bridge.