The incidence of colon cancer is much lower among japanese populations living in japan than among caucasian populations in the united states. the incidence of colon cancer among japanese living in the u. s. is similar to that of caucasians living in the u. s. circle the hypothesis that may explain the observation:

# The circled hypothesis is that the scientists are testing;

• The incidence of colon cancer in Japanese and Caucasian people is higher in the United States than in Japan.

#The elements of the experiment in this context are in the category (IV, DV and Control)

The independent variable links to type of people being tested.

The dependent variable is the incidence of colon cancer.

The control is where the people live.

Explanation:

dgjnuuk

explanation:

is the dgjofgkg. huukkg u

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.