Three processes that occur in cells are described in the box. • Substances pass through the lipid bilayer of a cell from areas of high concentration to areas of low
concentration.
• Substances move through protein channels of the lipid bilayer of a cell from areas of high concentration to
areas of low concentration.
• Substances move through the lipid bilayer of a cell from areas of low concentration to areas of high
concentration.
These processes are all examples of -


Which organelles are involved in energy conversion

Which of the following protists gets nutrients mainly by absorbing molecules from other organisms through their cell walls and cell membranes? a. amoebas b. water molds c. ciliates d. slime molds

Which table best shows the impacts resulting from human activity? impact of human activities human activity impact forest area cleared to construct an airport increase in oxygen level vegetation cleared to construct an oil mine increase in pollution impact of human activities human activity impact forest area cleared to construct an airport increase in sound pollution vegetation cleared to construct a power plant contamination of water impact of human activities human activity impact beehives cleared from urban areas increase in vegetation dams constructed on a river increase in fish population impact of human activities human activity impact beehives cleared from urban areas increase in bird population dams constructed on a river better quality of water