Question

to start populations, two routine of reproduction individuals, recorded at population time periods, the reproduction individuals are added to the populations. the number of bacteria after assessment.

images of populations of bacteria growing in a petri dish with nutrient agar, is put their provided food and space to grow. the chart here is led that sample bacteria show accumulating into or segregating out of the dish. every 15 - minute, some bacterium at the population reproduction normally by dividing with each, which doubles the population size

(image: petri dish containing growing colonies of bacteria)

this graph shows the growth of a population of bacteria over three hours.

bacterial population

(graph: y - axis: number of bacteria, x - axis: time elapsed (minutes))

choose all the statements about this population that are supported by the graph:

• the population demonstrated linear growth.
• facing with 15 - minute intervals, the population’s growth rate declined.
• the population had a constant growth rate.
• the bacterial population’s growth rate between minutes 105 and 120 was greater than its growth rate between minutes 15 and 30.

Explanation:

The problem is about bacterial population growth, which falls under Biology (a subfield of Natural Science). To determine the correct statements, we analyze the graph:

1. "The population demonstrated linear growth."

A linear graph has a constant slope (equal intervals of \(x\) and \(y\) change). The bacterial growth graph (likely exponential, as bacteria grow exponentially) does not show a straight - line (linear) pattern. So this is incorrect.

1. "Starting with 10 - million bacteria, the population’s growth was gradual."

The initial point on the graph (if \(y\) - axis is population) does not show 10 million as the start, and the growth pattern (exponential) is not “gradual” in the linear sense. So this is incorrect.

1. "The population had a constant growth rate."

A constant growth rate implies linear growth (slope = growth rate). Bacterial growth is exponential (growth rate increases as population increases), so the graph (exponential - like) does not have a constant growth rate. So this is incorrect.

1. "The bacterial population’s growth rate between minutes 120 and 180 was greater than its growth rate between minutes 30 and 90."

For exponential growth, the growth rate (change in population per unit time) increases over time. The vertical (population) change between 120 - 180 minutes is larger than between 30 - 90 minutes (given the graph’s curve), so the growth rate (slope of the secant line) is higher in the later interval. This statement is supported by the graph.

Answer:

The bacterial population’s growth rate between minutes 120 and 180 was greater than its growth rate between minutes 30 and 90.