Explanation:
This much is undeniable. Based on the magnetic fingerprints locked into ancient rocks, we know that over the last 20 million years, magnetic north and south have flipped roughly every 200,000 to 300,000 years (this rate has not been constant over the planet's lifetime, though).
This could weaken Earth's protective magnetic field by up to 90% during a polar flip. Earth's magnetic field is what shields us from harmful space radiation which can damage cells, cause cancer, and fry electronic circuits and electrical grids.
Letter A Animals are eukaryotes
Answer:
Explanation:
The stratosphere is the second-lowest layer of Earth’s atmosphere, starting at 10 kilometers above the surface. Unlike the troposphere, the temperature in the stratosphere increases with altitude. At the top, the temperature is around 32°F – almost 100 degrees higher than the bottom.
Quick growth to high densities of bacteria such as E. coli can give rise to mutants which are genetic variants within a species.
<h3>Mutants</h3>
Mutants are mutated forms of species.
Mutation refers to changes to the DNA base sequence of organisms. This can be caused by a variety of factors.
In a population of high density consisting of a single species, the frequency of mutation is usually high.
Mutation will create phenotypically different organisms within the same species population. These organisms are known as mutants and not only phenotypically different but also genetically variant.
More on mutants can be found here; brainly.com/question/12868218
A whole formed by combinig seperate elements
