Which gas prevents damaging ultraviolet radiation from the sun from reaching earth's surface?

a. ozone
b. nitrogen
c. oxygen
d. argon

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases

Why does it matter if osmosis is put into a “scab” or a “nosebleed? ” where would that leave him?

Dna. we have heard that we are a product of our dna. but where is it? how do we "get" our dna? it is passed to us, from our parents, but in what form? several vocabulary words associated with inheritance are used interchangeably and sometimes, incorrectly. let's see if you can clear this up for someone just learning about inheritance and cell structure.