<span>Proteins are different based on number and type of ____________ contained in their polypeptide chain(s)
</span>Amino acids
A keystone species refers to the organisms that define the entire ecosystem. These organisms are important because without them the ecosystem will work differently. They are known to be low in functional redundancy that means if these so-called keystone species disappear, there are no other species who can fill in their role. We can protect them by preserving and protecting their natural habitat, avoiding hunting activities especially the organisms that are considered to be critically endangered, planting trees, and proper waste disposal. These are some of the activities that we can do to protect them.
In eurkaryotes, the wrapping of DNA around nucleosome introduces negative supercoiling because negative super coil knots have high twisting stress and are less tightly packed.The combine loop of protein [histone] and chromosome is called nucleosome.
All of life can be divided into three major clades because it is believed that all branches of the tree of life have the same evolutionary origin.
<h3>What is evolution?</h3>
Evolution is descendence with modification, which generally is due to the process of natural selection.
Evolution indicates that all organisms derive from an ancestral organism (it is related to the cell theory).
In conclusion, all of life can be divided into three major clades because it is believed that all branches of the tree of life have the same evolutionary origin.
Learn more about evolution here:
brainly.com/question/4207376
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Answer:
all cells have the ability to move
Explanation:
