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science study stack
| Question | Answer |
|---|---|
| If the amount of food or resources available increases, the carrying capacity for an animal: | Increases |
| In a forest ecosystem, which of the following is the best example of a limiting factor for a rabbit population? | Grass available |
| Will competition increase/decrease the carrying capacity of an ecosystem for the animal in competition? | Decrease |
| An environmental factor such as predation, disease, and competition that depends on the number of members in a population per unit | density- dependent factor |
| An environmental factor such as storms and extreme heat or cold that affects population regardless of their density | density- independent factor |
| The population size that an environment can sustain is called the carrying capacity. Which of the following factors would not decrease the carrying capacity of a pond environment? | food shortages |
| Imagine that a city located in a desert environment has grown significantly over the last few decades. Which statement best describes how the growth of the metropolitan city would impact the desert environment in the area? | By destroying habitat to build homes and highways, the growth of the city would decrease the biodiversity in the desert. |
| The carrying capacity of an environment for a particular species at a particular time is determined by the | supply of the most limited resources |
| Which will add more organisms to a population? | 3 animals immigrate to the population |
| All populations fluctuate in size. Which of the following is a nonenvironmental factor that might cause a population to be reduced in size? | increased competition |
| Researchers have found that a local squirrel population fluctuates from year to year, increasing one year and decreasing the next. Which of the following factors would cause the squirrel population to grow? | the death rate is higher than the birth rate |
| For a population’s growth rate to be zero | the average number of births and deaths must be the same. |
| Which of the following limits a population’s growth? | all of the above |
| Which of the following limits a population’s biotic potential? | a maximum number of offspring each individual can produce |
| What factor describes when populations decrease because animals are moving out of a population? | Emigration |
| Populations do not continue to grow to an unlimited size. Their environment, including food and other natural resources, limits their size eventually. This limit is called the | carrying capacity. |
| What will happen to the population when the birth rate is larger than the death rate? | grow |
| Which factor would contribute to an exponential growth rate in a given population? | less competition |
| A biotic or abiotic resource in the environment that causes population size to decrease is a | limiting factor |
| Which of the following would cause a population to increase in size? | Immigration |
| 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? | It will stay the same. |
| If the number of births is greater than the number of deaths in a population, what will happen to the growth of the population? | It will increase. |
| When a population grows past the ecosystem's carrying capacity, what happens to the population? | The population starts to die off to return to carrying capacity |
| Which of the following is likely to be affected by a population of 7 billion? | amount of land for agriculture number of people who are unemployed amount of clean water all of the above |
| The number of live births per 1000 people is called the... | Birth rate |
| Which factor would be most likely to cause a low life expectancy for a country | diminished food supply |
| What is the formula of Growth Rate | birth rate-death rate |
| The number of deaths compared to the total number of people in a population is a: | death rate |
| Which of the following tells you population density? | the number of bacteria per square millimeter. |
| Clustered population refers to a population that is: | tightly packed into an area. |
| Which of the following is NOT one of the factors that play a role in population growth rate? | Demography |
| All of the following are limiting factors EXCEPT | immigration |
| Something that slows the growth rate of a population | Limiting growth |
| The highest rate of reproduction possible | biotic potential |
| There are 150 Saguaro cacti plants per square kilometer in a certain area of Arizona desert. To which population characteristic does this information refer? | population density |
Created by:
Maria767