The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.
I believe the answer is "Evolution"
Andrew Huxley and Niedergerke are the scientists that discovered the sliding filament theory.
<h3><u>Explanation:</u></h3>
They said that the muscle filaments are made up of proteins like actin and myosin. Actin is the thinner protein that is formed of two subunits – G actin and the F actin. They together form the actin filament.
Myosin filament is formed of the units Heavy meromyosin and light meromyosin. These together make the myosin filament. These filaments slide over each other and attach themselves to make the muscle contract.
1. It is two
That's all i know
Sorry, i that is too little.