Outside, the sun dipped lower. Leo picked up his pencil and turned to the next chapter.
Leo deleted the search bar. He pushed back from the desk and stared at his real textbook—a battered, dog-eared thing, its cover a collage of microscopes and atoms. Exploring Science 9. He flipped to the section on cells. The diagrams were clear: a root hair cell, its membrane dotted with little protein pumps. The text was dense, but readable. exploring science 9 student book answers pdf
Leo had two problems. First, he didn’t know the answer. Second, he knew exactly where to look. Outside, the sun dipped lower
“Okay,” he whispered to the room. “Active transport. Moving particles from low to high concentration. Needs energy. Like pushing a boulder uphill instead of letting it roll down.” he didn’t know the answer. Second