Which claim is most likely to be based on pseudoscience? O A. The color of light from a star can tell you how old it is.
O B. The volume of a gas will increase if you heat the gas.
C. The arrangement of the sstars can bring you good luck.
O D. The planets in our solar system move around the Sun.

of those who start drinking before they're 15 will develop alcohol dependence

you need more balloons

1) a

2)c

3)a

4)c

5)b

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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.