This scientist performed an experiment where he weighed a pot with soil and then grew a seedling in it for five years. During this time, he only added water to the plant. At the end of five years, he weighed the soil and the amount of water added to the plant too. He found that the plant only gained about one gram of mass out of 76,000 grams of water that were added. He concluded that most of the water was exhaled through the pores in the leaves (stomata). Who was this scientist?
Jan van Helmont
John Woodward
Jan Ingenhousz
Joseph Priestly

4.06 hc)a five-year review of threats to the southern resident orca population of the united states concluded that the top threats were prey availability, contaminants, and effects from recreational and whale watching vessels. further down the list are oil spills, disease, and effects from commercial vessels not targeting whales. how might this list be different if it were for transient whale populations, which have a larger average population size and live farther offshore in open waters? a)the transient population is more likely to be affected by contaminants. b)the transient population is less likely to be affected by whale watching vessels. c)the transient population is more likely to be affected by disease. d)the transient population is less likely to be affected by prey availability.

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

As a small change in a person's dna can cause a genetic disorder