What happens during the process of nitrogen fixation?
A. Bacteria change ammonium into nitrate.
B. Bacteria grow on nodules on plant roots.
C. Bacteria convert gaseous nitrogen into
ammonia.
D. Bacteria absorb ammonia and excrete
ammonium.

Dr. bob hypothesizes that drug x causes cuts to heal more quickly. he performs a medical experiment on a group of 100 people and confirms his original hypothesis. in the control group, a 1 cm cut took seven days to heal. in the experimental group, a 1 cm cut took four days to heal. what should dr. bob do next? a) repeat the experiment for accuracy. b) begin selling drug x to the public. c) write a scientific theory about drug x. d) publish the results of the experiment in a scientific journal.

The image below shows a weather service map. which details best describe this map? check all that apply

What tool do geneticists use to predict the outcome of genetic crosses? a.karyotype b.punnett square c.centrifuge