Answer: A substitution mutation can be defined as a mutation in which a single nucleotide is replaced by the other. As a single nucleotide changes in this process which does not create an effect on the final protein so it is a least dangerous type of DNA mutation.
Explanation:
There are three types of substitution mutation:
1. Silent mutation: In this the replaced single base pair gets replaced by the mutated RNA sequence producing the same amino acid. If the nucleotide composition gets changed it will produce the same amino acid.
2. Missense mutation: The nucleotide composition gets changed as a result of addition of different amino acid after mutation in the protein.
3. A nonsense mutation involves the change in the stop codon. This results in non-functioning of the protein.
Earth had essentially no atmosphere when it originated 4.6 billion years ago from a heated mixture of gases and minerals. The ground had melted on it.
An atmosphere developed when Earth cooled, primarily from gases released by volcanoes. It contained methane, hydrogen sulfide, and ten to 200 times as much carbon dioxide as the atmosphere we are surrounded by today. The Earth's surface began to cool and solidify after roughly 500 million years, allowing water to accumulate there. Although life on Earth continued to develop and diversify, such periods of expansion and development were halted by mass extinctions, in which many of the planet's major life forms were either entirely or partially wiped out and many others were freshly established. Such catastrophic extinction episodes are attributed to asteroids impacts, climate change, volcanic eruptions, etc. Dinosaurs were also wiped out in one such event. The largest problem the Earth is currently experiencing is climate change brought on by human activity. Although human activities may exterminate some species from the world, the planet will undoubtedly recover and return to its natural balance as it has for millions of years. However, the sun will ultimately wipe out Earth, as predicted by scientists. The Sun will lose its structural integrity and enlarge in volume as it ages and eventually runs out of the fuel that keeps it going—hydrogen—which will cause it to burn everything in its path, including life on Earth. In the end, the Sun would perish, leaving the Solar System permanently in the dark.
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Answer:
Ginger is a rhizome (modified plantstem).
Explanation:
Rhizome of ginger is a modification of stem because it bears nodes and internodes. Rhizome is a modified stem of a plant that is usually found underground, often sending out roots and shoots from its nodes. Rhizomes are also called as creeping root stalks.
Glycolysis and fermentation are processes of converting complex molecule or substance into simpler form for easy absorption or usage. Both converts sugars or carbohydrates into useful form but differs in a way that fermentation uses yeast or bacteria in the process of conversion.<span>
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Answer: It would unbalance the ecosystem.
Due to the fact that if some species die off, the other species that rely on those species for food or protection would loose that food/ protection which may lead to their extinction and their extinction would lead to another extinction and so on.