Teperature
Ph level
Substrate concentration
Not sure if these are physical but hope it helped.
Answer: B)heavy-chain constant segments
Explanation:
The immunoglobulin are the antibodies that are found in the serum. There are five classes of these antibodies in the serum. These includes the IgG, IgD, IgA, IgM and IgE. They are classified on the basis of difference in the type of heavy chain. IgG, IgA, IgE, IgD contains μ, α, ε-, and δ- heavy chains respectively.
This variation helps each immunoglobulin class to generate a different kind of immune response during different stages of body defense.
Answer:
they are all considered a metal
Explanation:
Answer is: adenine will form a cross bridge bond with <span>thymine.
</span>Amount of adenine (A) in the DNA of an organism is the same as the amount of thymine. Adenine and thymine <span>bound to each other by </span>hydrogen bonds, one adenine has two hydrogen bonds with one thymine. CG pair has three hydrogen bonds.
B.) Nucleus because <span>prokaryotic cells do not have a nucleus and Eukaryotic cells do</span>