Katya listed major questions that scientists try to answer when they classify organisms. Her list included the following questio
ns: How many living things are there? What are the characteristics that define living things? What additional question would be best for Katya to add to her list about classification? How do living things get energy? What do living things need to survive? Where do living things make their home? How are living things related?
<span>An ecosystem can only sustain so many organisms. That limit would be its carrying capacity. If the population goes above that number then other factors will cause the population to crash and then rebound to a constant level. </span>
