What is a food chain? All living things including humans, animals and plants need energy to live. But, where do they get their energy from? The answer is easy - all living things get their energy ...

Resistance to these drugs poses a significant public health risk, potentially leaving few effective treatment options.

NARRATOR: What is a food chain? All living things, including humans, animals and plants, need energy to live. But where do they get their energy from? The answer is easy - all living things get ...