Why are some moleules polar and other non polar

Astudent 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. if you were asked to graph this data, what would you place on the x-axis? a. fertilizer b. water c. plant growth d. week one

Using meiosis, the sporophyte produces spores that are .

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.