A closed system is a system in which (a) Matter can enter and leave
(b) Matter can enter but cannot leave
(c) Matter can leave but cannot enter
(d) Matter does not enter or leave

Which list shows the levels of organization of an organism in hierarchical order from left to right, from the smallest to the most complex?

Did you know that a single bee would have to go to over 2 million flowers to make a single pound of honey?

What is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell? a. passive transport b. diffusion c. endocytosis d. exocytosisc. endocytosis