Which one of the following supports the hypothesis that life has changed over time?
a.) prokaryotes has no nucleus

b.)fossils are distinct from rock layer to rock layer

c.)some fossils plants have deep roots

d.)the cell has no membrane

Select the correct text in the passage. which sentences describe examples of sustainable living? i live in an old apartment building downtown, but my company is based in an office park on the outskirts of the city. i drive an old car that needs to be replaced. i plan to buy a hybrid for better gas mileage, but for now i am able to carpool with a couple of friends from work. the drive to the office park is about 45 minutes each way, but we do get to work in a modern building. the architects just received a leed certification for the design.

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?