Kelly hypothesizes that if she waters a fig tree seedling, it will grow twice as fast as an unwatered seedling. which of the following steps would compromise her experiment?
1. plant two fig tree seedlings of the same age
2. water one of the seedlings three times a week
3. apply fertilizer to the other seedling three times a week
4. measure the seedlings growth weekly
5. report her results
a step 1
b step 2
c step 3
d step 4

How energy flows through each level in this energy pyramid. is all the matter and energy from one level transferred to the next level?

One of the newest applications of cell technology is called cybrid embryos. this process involves replacing the nuclear material of an animal cell with human nuclear material. how might this process affect public policies about research by using stem cells? the same policies and concerns about the use of human embryonic stem cells would most likely apply. the embryos would most likely be treated like traditional animal embryos and regulated accordingly. the process of forming cybrid embryos would most likely be banned by government regulators. the embryos would be treated as regular cells because they are not fully human in origin.

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.