One grape is placed in tap water and another grape is placed in salt water.
The change in their mass is measured
after a day.
What is the independent and dependent variable

Why do bacteria thrive even in hostile environments

The frequency of alleles in a population that is in hardy weinberg equilibrium? a . changes in each successive generation b. is less important than the frequency genotypes c. shows evidence of the process of natural selection d. remains the same over several generations

_tissues respond quickly to outside stimuli a) epithelia b)nervous c)muscular d)muscular and nervous