Answer:
DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C). The order of these bases is what determines DNA's instructions, or genetic code.
Explanation:
Genetic variation<span> is essential for </span>natural selection<span> because </span>natural selection can only increase or decrease frequency of alleles that already exist in the population.Genetic variation<span> is caused by: mutation
i pulled this off of the site i got the information from i hope this helps you out if not sorry
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Fill a graduated cylinder to 10mL, place the rock inside and calculate the difference in mL.
Procedure Bigsub is
procedure A (Flag: Boolean ) is
v,w : Integer
procedure B is
u,y : Integer
A(false);
end; -- of B
if flag
then B;
else C;
...
end; -- of A
procedureC is
u,w,y : Integer;
procedure D is
t,z : Integer
...
z = t*u + y-w;
...
end; -- of D
...
D;
end; -- of C
begin
t,u,v : Integer
...
A(true);
...
end; <span>-- of BigSub</span>
