Use the table below to answer the question.

a student wants to test the hypothesis that fertilizer improves the growth rate of grass seeds. to test this hypothesis, the student put the same amount of grass seed in 3 containers with the same type of soil. the student measured the growth at the end of the week. all plants received equal amounts of water and sunlight.

a: 2cm

b: 4cm

c: 6cm

d: 12cm

what is the mean height for the grass used as a control?

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?

What form of anesthetic was used for field surgery