When the dna molecule folds, coils and super coils to fit in the cell what structure does it form? a. chromosomes b. gene c. double helix d. single helix

Which ideas did your answer contain? check all that apply. no food for organisms no oxygen in the atmosphere no trees or flowering plants no products based on trees or plants (building materials, medicines, fuels, fibers) no fossil fuels

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

15 ! come and answer! a(n) is the general term for an infectious disease that has spread across a city, region, or country.