A toxin or other foreign substance which induces an immune response in the body, especially the production of antibodies.
Answer:
C. Viruses
Explanation:
Viruses lack the properties of living things. They have no energy metabolism, they do not grow, they produce no waste products, and they do not respond to stimuli. They also don't reproduce independently but must replicate by invading living cells.
Answer:
The fact that you have a task set in mind is something that can make you persist. The urge to satisfy your need to finish that task with the sharp tool is what drives you to persist with using the sharp tool knowing what could be the possible outcome of using it.
Explanation:
Enzymes can be best described as catalysts in living systems. This is because enzymes accelerate chemical reactions without being used up in the process.
Answer:
Gibberellins were extracted from <em>Bacteria</em>
