COMPETITION AND RELATIONSHIP:

What two different species have an indirect relationship ?

we can state relationship between tiger and deer for example because when tiger decrease then deer increase and when deer increase then plants will reduce and this will cause a lot of problems to every one hence we can see relationship between two different species

ones direct and the others is indirect

Explanation:

I hope it might correct answer or maybe I'm wrong I'm not sure

c.           is the correct answer

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.