Question

1. how can bacteria be helpful? 11. bacteria cannot eat directly, they must first secrete ____ that break down nearby food sources and then absorb the nutrients. 12. how can bacteria move around? 13. tiny, hairlike structures that help bacteria propel are called ____.

Explanation:

1. Bacteria can be helpful in processes like decomposition, nutrient - cycling, food production (e.g., yogurt - making), and in the human gut for digestion.
2. Bacteria secrete enzymes to break down food sources before absorption.
3. Bacteria can move using flagella (whip - like structures), pili (hair - like structures for twitching or gliding), or by other mechanisms like gliding motility.
4. The tiny, hairlike structures that help bacteria propel are called pili.

Answer:

1. They aid in decomposition, nutrient - cycling, food production, and digestion.
2. Enzymes
3. Using flagella, pili, or gliding motility.
4. Pili