Circle the letter of each molecule that makes up the sides of the DNA ladder.
a. deoxyribose
b. glucose
c. phosphate
d. oxygen

Eutrophication caused by human nutrient pollution.

What is the function of the root cap? a. extra-absorbent cells in the root cap absorb more water and nutrients b. protect the meristematic area of the stem c. contains sensors for sunlight d. increases surface area of the root

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.