No system is completely closed off from its surroundings. which represents a system that is almost completely closed?
a. a wood-burning fireplace
b. a washing machine
c. a capped soda bottle
d. a pot of boiling water
i thinks its
c.

Which of the following are the functions of the skeletal system? blood cell production in soft marrow tissues and mineral reserves largest organ of the body for defense and support vitamin d production and pumping blood through vessels voluntary movement and contractile movement

Which flexible structure that supports the nerve cord and led to the backbone

Environmental impacts on evolution : mastery test