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• down group 2 the number of protons increases therefore the nuclear charge increases (protons are found in the nucelus and have a +1 charge)

• the number of shielding electrons ...

The Polymerase Chain Reaction (PCR) is a method of DNA amplification in vitro. It consists of 3 stages - denaturation, annealing and extending. PCR relies on the use of a thermophilic Taq polymerase en...

Introns and exons are parts of genes - exons code for proteins, whereas introns do not, ie: exons are converted into messenger RNA to allow these parts of the gene to then be transcribed into protein. ...

Oral cavity, Oesophagus, Stomach, duodenum, jejunum, ileum, colon, rectum, anus.

Ser feliz means that the person is always happy whereas estar feliz means the person is happy today.