Answer:
below
Explanation:
when an organism decays, burning fossil fuels, respiration/breathing.
These are the top three that come to my head, hope this works :)
<span>simple organic molecules can form spontaneously under conditions like those thought to prevail early in Earth's history</span>
Answer/Explanation:
All cells are not the same because not all cells contain membrane-bound organelles.
Prokaryotic cells lack membrane-bound organelles. In contrast, eukaryotic cells contain membrane-bound organelles like an endoplasmic reticulum, lysosomes, and importantly, a nucleus.
The nucleus is where genetic information (DNA) is stored. However, it is only present in eukaryotic cells. Prokaryotic cells do not possess a nucleus, the DNA is found in the cytoplasm.
They find shells that other crabs have left behind and use them
