The Earth's system is divided in four subsystems: land (lithosphere), water (hydrosphere), air(atmosphere) and living things (biosphere).
Carbon is sixst most common chemical element on Earth.
<span>The most carbon on Earth is stored in a surprising place: the ocean.</span><span>This means that the most of carbon is stored in the lithospehere.
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Carbon is most abundant in the core and in the atmosphere.
The first living things on Earth, single-celled micro-organisms<span> or microbes lacking a cell nucleus or cell membrane known as prokaryotes, seem to have </span>first<span> appeared on </span>Earth<span> almost four billion years ago, just a few hundred million years after the formation of the </span>Earth<span> itself.</span>
Answer:
C. a decrease in the chromosome number in every generation.
Explanation:
hope it helps .
Answer: i believe it is mutation
Explanation: An insertion mutation occurs when an extra nucleotide is added to the DNA strand during replication. This can happen when the replicating strand "slips," or wrinkles, which allows the extra nucleotide to be incorporated (Figure 2). Strand slippage can also lead to deletion mutations.
I believe that the areas are tropical and polar zones.
