Answer:
A. Oxygen
Explanation:
During cellular respiration the cell uses oxygen to break down sugar. When sugar breaks down it produces energy in which your body needs. Blood picks up oxygen and releses carbon dioxide into your lungs.
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Answer:
The trachea branches into two tubes called bronchi (one to each lung). The bronchi split into smaller and smaller tubes called bronchioles, which then end in microscopic alveoli (air sacs). ... The layer of moisture in the alveoli allows gases to dissolve so that they can diffuse quickly.
Allows for new plants to grow back healthier and it eliminates invasive species
The lettuce is the producer, the lettuce starts the chain and keeps it going for the other ecosystems included in the chain.
Active transport is the movement of molecules across a cell membrane from a region of their lower concentration
to a region of their higher concentration— against concentration gradient
Facilitated diffusion is the process of spontaneous passive transport of molecules or ions across a cell's
membrane via specific transmembrane integral proteins.
Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration.
