Oxygen is . A. Element
B. Composite
C. Homogeneous mixtures
D. Heterogeneous mixtures

Suppose you use three different scale to weigh a bag of organges. one scale says the nag weighs 2.1 lb, and third says it weighs 2.1 lb. the actual weight of the bag of organges is 2.153 lb. which of the following best decribes these results?

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?

Dna replication occurs in preparation for