Answer:
adenine, thymine, guanine, and cytosine
Explanation:
Alternative source of energy such as Solar power, nuclear power , hydroelectric power , bio fuels , geothermal power, wind energy etc have potential to provide energy with much lesser pollutant emission , hence improving air quality and reducing greenhouse gas production
<u>Explanation:</u>
- One of major environmental issue –Air quality having large dependence on atmospheric emission, especially from burning fossil fuel
- Fossil fuel combustion results numbers of air pollutants, which are harmful to health as well environment. It is one of major reason of global warming.
- SO₂(Sulphur oxide) and NOx (nitrogen oxides) which are byproducts of fossil fuel combustion when emitted into atmosphere causes smog and acid rain
- Alternative source of energy produces less pollutant which help in protecting air quality and water quality. It also causes much less damage to public health, global warming , wildlife loss etc comparative to burning fossil fuels
Answer:
The answers are matched as follows:
African forests have been hunted to near extinction levels to obtain ivory-------------->human exploitation
The eruption of mount Saint Helens destroyed some populations of conifers------> natural disasters
An infection with a fungus reduced the population of North American Elm trees ----> disease
Increasing global temperatures have altered migration patterns of humpback whales ------>climate change
Visible light is the answer
Answer:
DNA ligases
DNA kinases
Explanation:
DNA kinases are enzymes responsible for the regulation of many biological phenomena. By covalently attaching a phosphate group to its target (phosphorylation) a kinase is able to regulate a particular biological reaction. Kinases are virtually involved in almost every signal transduction pathway occurring in a living cell.
DNA ligases are commercially available. Optimally active in the range 45 to 80°C. These enzymes are perfect for ligating adjacent oligonucleotides that are hybridized to the same target DNA. This property can be used for ligase chain reaction ,for mutational analysis, or for gene synthesis.