Ecology Quiz

The average number of individuals per unit of area or volume is called ______.

• Population size
• Population systematics
• Population density
• Population distribution

The lion is the natural predator of the zebra. If the zebra population drops, what will likely happen to the lion population?

• drop
• thrive
• be unaffected
• decrease, then increase exponentially

Under ideal conditions with unlimited resources, a population will have ________.

• linguistic growth
• experimental growth
• exponential growth
• logistic growth

Which of the following are abiotic factors that shape ecosystems?

• worms, plants, and temperature

• wind, precipitation, and soil type
• niches, trees, and bacteria
• sunlight, mushrooms, and wind

The common brushtail possum is a marsupial native to Australia. This possum was introduced to New Zealand where it had no natural predators and had an abundant food supply. Which of these likely occurred a few years after the introduction of this possum to New Zealand?

• The possums became extinct.
• The possums developed shorter life spans.
• The possum population grew to a larger size.
• The possum population evolved into a different species.

Processes that remove individuals from a population.

• death and emigration

• birth and immigration

Which of the following are density independent factor(s)?

• competition for resources

• predator-prey relationships

• parasitism and disease

• weather, natural disaster and man made disturbances

What type of growth is represented in this graph?

• exponential
• logistic

• survivorship curve

• predator-prey

What is the carrying capacity of the following graph?

• 1000
• 8000
• 800
• 600

What is the largest number of individuals that an environment can support long term?

• carrying capacity

• emigration

• immigration

• survivorship