The main reason is because they are heavy, and because they don't have to chase their food. They're not predators and their shells give them protection like running away gives protection to other herbivores.
Oou do the one where you see which plants grows best in different lighting
Flagella are long, thread-like appendages which provide some live single cells with the ability to move, motility. Bacteria which have flagella are either rod or spiral-shaped and are known as bacilli and spirochetes, respectively. Cocci, or round bacteria, are almost all nonmotile. I hope this helps you :) I Have this in my Bio Notes
Answer:
Because it is needed inside the organism in smaller quantities, in contrast with macronutrients wich are needed in great amounts.
Explanation:
