Question

ecosystems and their resources are finite. eventually, populations run out of food, space, or some other resource they need to continue growing. so there is a maximum number of individuals within a population that an ecosystem can support. this maximum number is the ecosystems carrying capacity.
bacterial population
based on the graph, what was the petri dish’s approximate carrying capacity for bacteria?
15 billion 17 billion 18 billion 24 billion

Explanation:

Step1: Understand Carrying Capacity

Carrying capacity is the maximum population an ecosystem (here, Petri dish) can support. On the graph, it's where the population stabilizes (flattens out).

Step2: Analyze the Graph

Look at the "Bacterial population" graph. The y - axis is population size (in billions), x - axis is time (hours). The data points level off at a certain y - value. From the graph, the population stabilizes around 18 billion (checking the y - axis scale and the horizontal part of the data points). The other options: 15 is too low (population is still growing then), 17 is before stabilization, 24 is higher than the stabilized level.

Answer:

18 billion