Populations (HW), Symbioses (ASY)

Something that regulates the size of a population is called...

• a limiting measure

• a limiting factor

• carrying capacity

• biodiversity

This may cause a population to increase

• increase of food supply

• removal of predators

• removal of disease

• all of these

What is the carrying capacity of the graph?

• around 500

• more than 800

• less than 300

• around 700

When death rate is equal to birth rate...

• population increases

• population decreases

• population stays the same.

• population rapidly increases then becomes stable

Which of the following is a limiting factor in a population of organisms

• reproductive replacement
•  life spans of the members
• fluctuations in atmospheric temperature
• availability of food

What type of growth is shown in the diagram?

• exponential growth
• logistic growth 
• predator-prey cycle
• boom-bust curve

What happened to the Hare population after the decrease in Lynx population in 1860?

• The decrease of lynx led to an increase in the amount of hares.

• The decrease of lynx led to a decrease in the hare population.

• The hare population stayed the same.

Which limiting factor is independent of the number of individuals in a population?

• competition
• parasitism/disease
• predators

• natural disasters

What point on the graph represents the carrying capacity?

• A

• B

• C

• D

Cattle egrets forage (feed) in fields among cattle. The egret gets easy access to flying insects stirred up by the cattle, and the cattle don't care if they are there or not.

• mutualism
• commensalism
• competition
• parasitism