Identify the variable in the researchers' experiment that is dependent on the percent of reflected light the apple trees receive. Justify the use of genetically identical apple trees as a controlled factor in the experiment. Using the data provided, describe the effect of the different ground covers on the percent of light reflected. Calculate the percent change in the average concentration of flavonoids in apples grown with the reflective ground cover compared with the apples grown with the grass ground cover.

(select all the correct choose each statement that is scientific. - the opinions of randomly selected participants in a survey prove the idea that global temperatures are not increasing on earth. - the universe's average temperature and rate of expansion support the idea that it began as one super-dense and hot mass 13.8 billion years ago. - ocean tides are caused by the uneven gravitational pulls of the moon and sun on different parts of earth. - human life is more valuable than other forms of life on earth because humans are more intelligent than other organisms.

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?

Which example describes a mutualistic relationship between organisms? young wasps prey on caterpillars. crabs eat the remains of dead fish. tapeworms feed on food in the intestines of cats ants protect a tree on which they feed.