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There are differnet ways that substances can move across a cell surface; simple diffusion, facilitated diffusion, osmosis or active transport. Most substances can move across the cell membrane via simple ...

Succession initiates in regions where there are very harsh conditions and so no organisms are able to survive (therefore little biodiveristy);

-a pioneer species with good adaptaions are able to su...

Firstly, the relevant DNA has to be unwrapped, because it is stored in a very tightly wrapped-up form to save space in the cell. The Hydrogen bonds between the two strands are broken, and the coding stran...

Nucleus: Contains the DNA/ Human genome in the form of chromosomes (with the help of histone proteins), within a nuclear membrane which is inpenetrable by cytosolic enzymes.

Golgi Apparatus: Transp...

Skeletal muscle is composed of myofibrils. The myofibrils contain repeating units called sarcomeres. This also called the operational units. The sarcomeres contain actin filaments and myosin filaments. Th...