You have a vial containing 20.0g of oxygen gas. What is the percent composition of oxygen? SELECT AN ANSWER

Cannot be determined without more information

83%

100%

90.8% oxygen

pleas

pleas

Four types of motile cells in human body?

All but one describes an effect of aging on the digestive system. a) decreased acid secretion b) decreased elasticity of stomach c) capacity to resist damage decreases d) food remains in stomach for less time

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.