Surface tension<span> is the property of the surface of a liquid which allows it to resist an external force. It is due to the cohesive nature (stickiness and clumpability) of the water molecules. </span>Since water has a strong surface tension:
<span>1) </span>The surface tension of water provides the necessary wall tension for the formation of bubbles with water
<span>2) </span>It is responsible for the shape of liquid droplets, too
<span>3) </span>Small objects will "float" on the surface of a fluid, as long as the object cannot break through and separate the top layer of water molecules
If surface tension is weak, the reverse happens. Bubbles will come from round to spherical, small objects will not float, w<span>ater will fall as it is, without forming spherical droplets and will not immediately spread. </span>
Answer:
The correct answer is - compound light microscope
Explanation:
Growth bands in the scale of the fishes are used to determine and found out the age of fish by counting the number of annuli on a scale and proportional growth can find out by the space between scales.
A compound light microscope is a microscope that is used to examine or see the specimen that can not be seen by the naked eye or the hand lens, it provides the range of 40x-1000x magnification power.
NPS is more harmful because difficult to regulate it
Alleles are different versions of a gene
Answer:
A. Restriction enzymes cut DNA at specific locations, producing ends that can be ligated back together with ligase.
Explanation:
Restriction enzymes are one of the endonucleases that cut the DNA at specific base sequences. The base sequences recognized and cut by the restriction enzymes are known as restriction sites.
Restriction enzymes are used in recombinant DNA technology to cut the DNA at specific sites. Restriction enzymes can produce DNA fragments with sticky ends or blunt ends. These DNA fragments are joined together by DNA ligase enzyme.
For example, the donor DNA and the vector DNA are cut at specific sites using a particular restriction enzyme. The resultant DNA fragments have complementary ends that are ligated together by the action of a DNA ligase enzyme. The result is the insertion of a gene of interest into the vector DNA.
