I think the correct answer from the choices listed above is option C. It is the polymerase chain reaction techniques that is used by researchers to carry out DNA replication in vitro. It is a technique used in molecular biology to amplify copies of a piece of DNA.
Two ways a population can increase is more births than deaths, and immigration to the area.
Water is a very important transport medium for living organisms because of its solvent properties and because it remains a liquid over a large range of temperatures. The cohesion (stickiness) between water molecules means that a very tall thin column of water can be supported before it breaks. Water's extensive capability to dissolve a variety of molecules has earned it the designation of “universal solvent,” and it is this ability that makes water such an invaluable life-sustaining force. On a biological level, water's role as a solvent helps cells transport and use substances like oxygen or nutrients.
<em>I hope this helps some~ <3</em>
<em>-Dream</em>
<span>The answer is A. A stable ecological niche leads to the absence of selection pressures, which in turn causes species to remain unmodified or in stasis. This can be simplified with an example: If there are just enough lions on an island and just enough buck for both species to survive without the lions starving or the buck being killed off, neither of the species would have to adapt to survive because their predator-prey relationship is stable. This means that they can continue to live in this state of stasis or equilibrium. </span>