Answer:
d. Lysine is replaced by tryptophan (nonpolar)
Explanation:
Amino acid substitutions can have varying affects on the protein function, depending on the specific substitution and the location of the substitution.
If the substitution occurs in an important region, for example an enzyme active site, then the function of the protein could be destroyed.
Additionally, if the substitution replaces the amino acid with a highly different amino acid with different properties (eg. polarity), it could alter the structure and function of the protein.
Replacing lysine (polar) with a tryptophan (non-polar) changes the properties of the amino acid at that location, whereas the other substitutions do not.
The answer is The law of ''gravity'' helps explain why the density of air as the altitude above earth's surface increases.
One valid inference that can be made regarding the evolution of modern horses is that : Pliohippus had teeth adapted for grazing
<h3>Description of Pliohippus </h3>
From the information provided in the question The modern day horse resembling the pliohippus can be inferred to have teeth which is adapted for grazing just like the pliohippus.
The pliohippus evolved from the merychippus which is classified as a grazer. because of its longer/taller teeth the pliohippus was more adapted to grazing than been a browser.
Hence we can conclude that One valid inference that can be made regarding the evolution of modern horses is that : Pliohippus had teeth adapted for grazing
Learn more about modern day horses : brainly.com/question/688848
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4 because osmosis does not require energy
<span>The answer is : movement, reproduction, obtaining food and oxygen, and body structure</span>
