There are four main types of tissue: muscle, epithelial, connective and nervous. Each is made of specialized cells that are grouped together according to structure and function. Muscle is found throughout the body and even includes organs such as the heart. Our outer layer of skin is epithelial tissue.
Restriction enzymes<span>, also known as </span>restriction endonucleases<span>, are </span>enzymes<span> that cut a DNA molecule at a particular place. They are essential tools for recombinant DNA technology. The </span>enzyme<span> "scans" a DNA molecule, looking for a particular sequence, usually of four to six nucleotides.</span>
The most appropriate answer is A !!
<span>Geographically isolated populations may live under different environmental conditions, which can lead to each of these separated populations adapting differently to these different conditions. Given enough time, these little changes can lead to those populations diverging into distinct species after so many successive generations. </span>
