Which three organ systems work together to take in oxygen and other nutrients and deliver them to an animal's body cells?
A. Digestive, because it breaks down the nutrients in food into
substances that can be used by cells
B. Respiratory, because it takes in gases from the external
environment
I c. Circulatory, because blood absorbs nutrients and carries them to
other cells
OD. Nervous, because it controls the body functions and responses to
stimuli

Astudent sees several ants walking up a wall following the exact same trail that an ant took earlier. she wants to apply the scientific method to determine how the ants detected the trail. which of these steps would come first in her application of the scientific method? perform an experiment by cleaning the scent away from part of the trail. draw a conclusion that the ants follow a scent trail. make a prediction about what the ants will do after she cleans away part of the trail. hypothesize that the ants are following a scent trail that the first ant left.