Which of the following is a major principle upon which cell theory is based? a all cells form by free-cell formation. b all cells have dna. c all organisms are made of cells. d all cells are eukaryotic.

Explain the importance of producers, primary consumers, secondary consumers. and decomposers in an ecosystem

What would be the most likely result if the ph of the stomach were increased to 5

Flock x flock y flock z total pieces of food eaten (from previous page) 147 93 60 food percentage* % % % simulated number of birds in flock for 3rd generation** * divide each flock's total pieces of food by 300, the total number of pieces of food eaten. ** multiply the food percentage for each flock by the total number of birds (30).