A scientist added bacteria to a sterile petri dish with a growth medium called agar. No other materials were added. The graph shows the growth of bacteria over time.
Bacteria Population
Time
Which of these most likely explains why the bacteria population stopped growing?
O a
Ob
Oc
Od
The bacteria came in contact with a virus that killed off the population.
The bacteria could not produce any longer because the population was too large.
The bacteria competed for nutrients and died after all of the nutrients were consumed.
The bacteria evolved into another organism.

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.