Unit 1 Review

Limiting factors that impact the size of a population no matter how large/small that population is.

• Density Independent Limiting Factors

• Carrying Capacity

• Exponential Growth

• Density Dependent Limiting Factors

An Abiotic Factor is a NON-living factor that can affect an ecosystem

• True

• False

If the number of births in a population is the same as the number of deaths in a population, what will happen to the growth of the population?

 On remote islands, immigration and emigration usually do not have a large effect on population sizes. A bird population on a remote island remains at a relatively constant size year after year. Which of the following most likely describes the birthrate and the death rate for this population? 

• 
   Birthrate and death rates are both zero 

• Birthrate and death rate are close to equal.

• Birthrate is significantly less than death rate. 

• 
  Birthrate is significantly greater than death rate. 

Factors that cause population size to increase:

• Birth

• Immigration

• Death

• Emigration

The number of pythons found throughout Everglades National Park has increased recently. These huge snakes are not native to Florida and are believed to have been released into the wild by pet owners. Wildlife biologists have initiated attempts to capture and remove these pythons. Which statement best explains the biologists’ reason for removing these pythons from the Everglades?

• The pythons could upset the territorial boundaries of native organisms.

• The pythons could adapt to overcome diseases common to native snakes.
  

• The pythons could prey on native organisms and cause native populations to decline.

• The pythons could begin to interbreed with native snakes and produce a more successful species.

Which of the following best explains the difference in the amount of available energy in the trophic levels of the desert ecosystem?

• There is less energy available in the producers because their tissues are less dense than those at higher trophic levels.

• There is more energy available in the second trophic level because less energy is needed for hunting compared to the higher trophic levels.

• There is less available energy in the fourth trophic level because of the loss of energy through metabolism in each of the lower trophic levels.

• There is more available energy in the birds of prey because they have greater muscle mass for storing energy than organisms in lower trophic levels have.

In which of these succession steps are you most likely to find lichens?

• Step 1

• Step 2

• Step 3

• Step 5

The picture above contains an Anglers fish. Anglers fish are know to be found in parts of the ocean where there is no light, no photosynthesis, least amount of oxygen and CO2 is accumulated. In which zone would you find an angelers fish?

• Euphotic

• Dysphotic

• Aphotic Zone

Death rate and Birth rate are determined by:

• Per 10 people

• Per 100 People

• Per 1000 people

• Per 1 Million People