1.
restriction fragment length polymorphism (rflp)
2.
variable number of tandem repeats (vntr)
3.
tandem repeats
4.
replication
a.
repeated segments on the dna strand.
b.
the process of creating new dna from existing dna.
c.
one of the methods forensic scientists use to study dna.
d.
a section of a chromosome that has multiple copies of a particular dna sequence occurring in a repeating fashion.

1. Restriction Fragment Length Polymorphism (RFLP)

= c. One of the methods forensic scientists use to study DNA.

2. Variable number of tandem repeats (VNTR)

= a. Repeated segments on the DNA strand.

3. Tandem repeats

= d. A section of a chromosome that has multiple copies of a particular DNA sequence occurring in a repeating fashion.

4. Replication

= b. The process of creating new DNA from existing DNA.

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation:

1. is geographic distribution

2 is increasing complexity

3 is transitional forms