A substitution of thymine with adenine in one of the DNA codon causes a particular disorder. Which statement explains
how the change in DNA leads to this disorder?
A. The deletion mutation prevents the production of the
hemoglobin protein in the body.
B. The frameshift mutation prevents the production of several
proteins found in the blood.
C. The insertion mutation causes extra hemoglobin proteins to
attach to the red blood cells.
D. The point mutation causes a different amino acid to be added
to the hemoglobin.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands