question below:
A tight metal lid on a jar of pickles may loosen when it has been held in hot water. This is because the hot water causes the
answer below:
metal lid to expand more than the glass jar expands

question below:
Which of the following best describes a role of mushrooms in ecosystems?
answer below:
breaking down dead plant material

question below:
Which of the following is a central role of carbon in the chemistry of living organisms?
answer below:
Carbon can form many types of molecules with covalent bonds.

question below:
What is the basic unit of life?
answer below:
cell