Answer:
Active uptake (which I think you mean active transport) is important when the concentration gradient is against that of a certain substance, so it doesn't cross the membrane through diffusion or passive transport. It is sometimes necessary if a substance needs to move across a membrane but can't do so due to electrical charge or that there is a substance on the other side of the membrane preventing diffusion.
Explanation:
Energy and matter characterize both physical and biological systems. These systems are defined both by the types of energy and matter they contain and by how that matter and energy move through and between systems. ... This means that energy and matter can change forms but cannot be created or destroyed.
The toxins are the substances which decreases the conc. of oxygen in wzater and increase toxicity
Answer:
He describes basketball as asking him for his “hustle.” Instead, he gave the sport his heart. The speaker worked hard because he wanted to do the game justice. He wanted to show his love for the sport because that's “what you do / When someone makes you feel as / Alive” as basketball made him feel.
