The bell rang, and Mr. Petrov’s 6th-grade biology class scrambled to their seats. On the whiteboard, the title of the day’s presentation flickered:
"Everyone thinks roots are just brown sticks in the dirt," Mr. Petrov began, clicking his remote. "But they are actually highly organized machines." urok-prezentcija zony kornja 6 klass po biologii
As the presentation ended, Mr. Petrov handed out small magnifying glasses and sprouted beans. "The slides are over," he said with a wink. "Now, go find the 'helmets' and the 'hairs' yourselves." The bell rang, and Mr
The most popular slide came next. It looked like a fuzzy caterpillar. "This is the (or Maturation). Those 'hairs' you see aren't hair—they are Root Hairs. They increase the surface area so the plant can drink up every drop of water and mineral it can find. This is where the plant breathes and eats." Petrov began, clicking his remote