Question

connection to phenomena
the bugs and fungus in david’s jar are heterotrophs. how did they get the glucose and oxygen needed for cellular respiration?

Explanation:

Step1: Define heterotrophs

Heterotrophs cannot make their own food.

Step2: Source of glucose

They obtain glucose by consuming other organisms or organic matter in the jar.

Step3: Source of oxygen

Oxygen could be present in the air - filled space of the jar or dissolved in any liquid present in the jar.

Answer:

They obtained glucose by consuming other organisms or organic matter in the jar, and oxygen from the air - filled space or any dissolved oxygen in liquid within the jar.