An example of mutualism would be
a) a tick living on a deer.
b) a leech living on a person.
c) two dogs competing for food.
d) bacteria living in human intestines.

the answer to this predicament is false, by friend, i had this on a quiz, and i got it wrong, so i learned it, cos i was gonna have it on a test, and i got it right

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

garbage disposal because lysosomes dispose of old cell parts like garbage disposals dispose of old food.

answertheory;