Answer:
Polymerase chain reaction (PCR) test is used to duplicate traces of DNA from any living form, for identification purposes. The correct sequence is 1, 3, 2; based on the options given.
Explanation:
The steps to be followed for the PCR procedure are:
<em>Denaturation</em>
Option 1. Involves incubation at 94°C to denature DNA strands into single strands by breaking of weak hydrogen links
<em>Annealing</em>
Option 3. Temperature is lowered to 60°C to allow primers joining their similar DNA sequences.
<em>Elongation</em>
Option 2. Incubate at 72°C to promote the extension of the DNA strands, actually extending them.
Beause we cut down a lot of trees. Often, so many, that the health of a forest is irreparably damaged. A forest is not just a bunch of trees. It is a whole ecosystem, in which the trees anchor the growth of many other plant and animal species, hold the ground together to prevent erosion, and produce a lot of oxygen to support animal life. If you harvest too many of the trees, the local ecosystem stops being a forest and starts turning into something else
Answer:
Access. A basic feature of any greenhouse is access. ...
Vents. One of the first greenhouse features necessary is a means of controlling the climate – most importantly, venting excess heat. ...
Fans. Fans inside a greenhouse are necessary for two basic functions. ...
Rollup Sides. ...
Heaters. ...
Shelves and Benches. ...
Water. ...
Electricity.
Explanation:
theres more but these are the important ones .
Raynaud's phenomenon.
Scleroderma is a group of autoimmune diseases that may affect different parts of the body with special intensity in the skin. Some of the affected structures may be blood vessels. Because of this, when exposed to cold, vasoconstriction occurs and the Raynaud's phenomenon is manifested in the extremities of the body.
Answer: Chemical weathering decomposes or decays rocks and minerals. An example of this is water and limestone. Organic weathering happens when plant break up rocks. One the rock has been weakened and broken up it is ready for Erosion. This happens when rocks are picked up and move usually by water. Mechanical weathering breaks up rocks, this usually happens when water gets into cracks, freezes and expands the rock
Explanation:
