Unit 3 Test
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The natural tendency of molecules to move from higher to lower concentrations is:
diffusion
Choose from the following list the four organ systems which are operational in a amoeba.
digestion, reproduction, respiration, excretion
The Krebs cycle takes place within the :
mitochondria
Any functional plant or animal with interrelated parts is considered as a(n) .
organism
Some leukocytes absorb entire by the process of phagocytosis.
bacteria
Why will external fluid flow into a plant cell?
because the external water concentration is greater because the external salt concentration is less
Which statement(s) corresponds to cellular respiration?
CO2 diffuses passively out of the cell O2 diffuses passively when converted to CO2
