<span>A
gradual change in phenotype over a geographical area is called a cline (or clinal variation).</span>
A
cline is gradual phenotypic (and/or genetic) differences over a geographical
area. It usually happens as a result of the change of allele frequencies within
the gene pool.
C i am guessing but i hope this helps
A root structure that protects buds from fire
helps short-leaf pines resist fires
Answer: Option D
<u>Explanation:</u>
Short leaf pine plant in the struggle for existence under hot scorching fire has developed a root structure that protects the buds from fire. This type of pine is called a fire resistant plant as it survives in the canopy of other trees.
Frequent burns have made them resistant to this fire. This is a wonderful example of how some plants survive in this extreme condition where it has to undergo frequent burns.They can also adopt and survive in drought conditions.
B. alternating phosphate groups and pentose residues
Reflections and absorption by the atmosphere prevent some radiation from reaching Earth's surface.
