Actin filaments are found in cells that form cytoskeletal structures. These are generally present below the plasma membrane.
Amoebae move by crawling over a surface (cell crawling), which involves GROWTH OF ACTIN FILAMENTS TO FORM PSEUDOPODIA. Pseudopodium is a bulge in the plasma membrane towards the direction of movement.
Answer:
4600-4500 million years ago, the Earth formed and its crust cooled to become solid. 4500-4400 million years ago, the oldest known thing to have formed on Earth, zircon, formed along with solid crust and oceans. 4200-4100 million years ago, the close of the Hadean Period (there are no surviving rocks).
These changes can<span> be caused by environmental factors such as ultraviolet radiation from the sun, or</span>can<span> occur if an error is made as </span>DNA<span> copies itself during cell division. Acquired </span>mutations<span> in somatic cells (cells other than sperm and egg cells) cannot be passed to the next generation.</span>
The ATP<span> and </span>NADPH<span> which are produced in the light-dependent reactions are utilised as the source of energy in the Calvin Cycle</span>
