15 points! the replication of dna occurs during which of these stages of the cell cycle: a. m b. s c. g1 d. g2 : )

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

Which type of organism is missing from the food web seen in the illustration? primary consumers decomposers primary producers secondary consumers

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