Answer:
An invasive species enters the environment.
Explanation:
All other answers already naturally happen in an environment so they are stable. But if an invasive species enters, the ecosystem will be less stable because invasive species dominate ecosystems which isn't natural to the animals that live there. So for example, if someone introduced an invasive species to the ecosystem, it can cause many changes like if it was a predator, there'll be less primary consumers (the animals that eat plants) because the invasive species isn't natural to them.
RNA
Nucleic acids provide the directions to make proteins. DNA provides the genetic code that RNA translates.
In regard to changes of ploidy, there are 3 types of cycles<span>: </span>haplontic life cycle<span> — the haploid stage is multicellular and the diploid stage is a single cell, meiosis is "zygotic". </span>diplontic life cycle<span> — the diploid stage is multicellular and haploid gametes are formed, meiosis is "gametic".
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It's on google lol :)
Hope this helped anyways
Yes I suppose they must. if the ground and crops all froze we wouldn't have food and if there was no more air we could not breathe and if there was no more sun we would freeze and if there was no more water we would die.
The function of the hormone progesterone is to regulate the condition of the inner lining of the uterus in females. I’m pretty sure at least