The smallest fragments travel the fastest because a smaller molecule has less resistance making it easier to travel through the gel.
The ocean and the present atmosphere themselves are not leftovers from the original atmosphere of Earth. However, they do contain components within them that give us and scientists ideas of what Earth's past atmosphere was like.
Some example include:
1) Ice cores - scientists may go to Antartica or Alaska and stick this metal tube into the ice to remove what is known as an "ice core". This is then taken back to the lab for analysis. So what happens is that this ice as we know is constantly melting and freezing with different seasons and climate change. So, when the ice starts to crystallize, particles like carbon dioxide, sulfur etc may get trapped as bubbles in the ice. This is what scientists look for in ice coring and this is how they know that Carbon dioxide levels were relatively high back then (Not as high compared to now).
2) Ocean sediment cores - this is the exact same process of the ice cores except they take cores of sediments (esspecially calcium carbonate that contains oxygen). As you know, CaCO3 is found in the exoskeletons of organisms that die and build up on the ocean floor.
Those are some of the main ways that the present atmosphere and oceans have leftovers from the original atmosphere of Earth.
Hope that helped!
Answer:
too much CO2 is toxic for humans to inhale. we rely on plants to absorb CO2 and produce O2. If they was a sudden extinction of all plants on earth, this would lead to a rise of CO2 which would reduce O2 air quality. (not good at all)
Explanation:
Answer:
d) genetic drift
Explanation:
The ABO and MN blood-type frequencies of the Dunkers differ significantly from those of current American and German populations due to Genetic Drift. This term refers to variation in the relative frequency of the different genotypes that may exist within a small population, which results in the extinction of different genes as individuals die without reproducing.
Answer:
Una mezcla homogénea es aquella en la que sus componentes están mezclados de forma tal que es imposible diferenciarlos a simple vista, estando distribuidos de manera uniforme. ... Por el contrario, los elementos de una mezcla heterogénea son distinguibles a simple vista y su distribución no es uniforme.
Explanation:
espero y esto te ayude
