Which of the following environmental issues represents the least immediate threat to ocean ecosystems?

a: entanglement of marine mammals in trawl nets and overfishing

b: melting of the ice caps and increased carbon dioxide levels in the atmosphere

c: nutrient runoff and industrial waste discharge

d: sewage and algal blooms

Prior to the development of dna fingerprinting, blood type could be used to determine possible parentage. although it might prove someone was not a parent, it could not show if someone was positively the parent, only that he or she might be a parent. which of the following is a true statement that can be made about parentage based on blood typing?

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

What is the one part of the nucleotide  that differs among the other different nucle  tides?