What is a better way than to use a respirometer in a lab?

Coyote and red-tailed hawk

Explanation:

In the food chain, there is producer, first consumer, second consumer and tertiary consumer.

The producer is plant, because plant can make food by itself.

The first consumer are usually animal lime insect because they eat only plants.

The second consumer are more like birds, fish or chicken.

The tertiary consumer are more like meat-eatin animals or carnivore.

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