Population Growth Practice Quizz

A population is...

• A group of one species living together

• Different species in one place

• All of the living and nonliving things

• None of these

Answer explanation

A population is a group of organisms of the same species living in the same area at the same time.

What is a biotic factor?

• 
• 
• 
• 

Answer explanation

Biotics means living

Which of the following will increase the size of a population?

• emigration and births

• immigration and births

• immigration and deaths

• emigration and deaths

Answer explanation

Populations will increase in size when there are more births and individuals moving into the population (Immigration).

What type of growth is shown in the graph?

• Exponential growth

• Average growth

• Logistical growth

• Extraterrestrial growth

Answer explanation

Logistical growth is an S-shaped curved on a graph. This means that the population grows over time but then slows down or stops growing when the population hits the carrying capacity.

What pattern of growth will a population with limited resources show?

• Density-dependent

• Logistical

• Exponential

• Extraterrestrial

Answer explanation

When a population has limited resources( such as food, water and shelter) the population size will slow down or stop growing reaching zero growth. We will see an S- shaped curve on the graph.

What type of population growth is shown in the graph?

• Logistical growth

• Average growth

• Exponential growth

• Extraterrestrial growth

Answer explanation

A population showing exponential growth will be display a J-shaped curve. This means that at first the population grows slowly then rapidly increases over time. This is due to NO limiting factors. Meaning there is plenty of food, water and space and other essential resources.

At what amount of yeast does the population in Figure 14.3 level off?

• 3.0 mg/cc

• 1.5 mg/cc

• 6.0 mg/cc

• 4.5 mg/cc

Answer explanation

A flat line indicates that the population has hit its maximum number of individuals that can be supported by the environment. Look at the Y axis (population size) at what number does the population level off?

What is the name for this leveling off shown in the graph?

• Logistic Line

• Carrying Capacity

• Mediocre

• Positive Line

Answer explanation

The flat line shows that the population has reached its carrying capacity at 6.0 mg/cc. Because of limited resources, the population stops growing when it hits the maximum number of individual that the environment can support.

Food, water, shelter and space are resources that are often

• Limiting factors

• Messy

• Found in rocks

• Plenty

Answer explanation

Limiting factors is anything that constrains a population's size and slows or stops it from growing. Food, water, shelter and space are essential resources that, when run out, will slow or stop a population from growing.

Which of the following is an example of a limiting factor?

• Migration

• Water

• Temperature

Answer explanation

Limiting factors are resources that are limited such as food, water and space.