Which best describes a theory?
a. an educated guess
b. an untested claim
c. a well supported conclusion
d. a proven fact

Use this diagram of an animal cell to answer the question. where does the first stage of cellular respiration occur? w x y z

Ectocarpene is a volatile, sperm cell-attracting material released by the eggs of the seaweed ectocarpus siliculosus. its constitution is all the double bonds are cis, and the absolute configuration of the chirality center is s. draw a stereochemically accurate representation of ectocarpene.

The leopard frog and the pickerel frog are two closely related species. in areas where their ranges overlap, the frogs will remain separate species if they