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Biology- Final- Sem1
| Question | Answer |
|---|---|
| What is not a factor that plays into the role of population growth? | demography |
| One of the main characteristics of a population is its | geographic transition |
| There are 150 Saguaro cactus plants per square kilometer in a certain area of Arizona desert. To which population characteristic does this information refer? | population density |
| What does the range of a population tell you that density does not? | the areas inhabited by a population |
| What is an example of population density? | the number of bacteria per square millimeter |
| The movement of organisms into a given area from another area is called | immigration |
| When organisms move out of the population, this is known as | emigration |
| What must occur in a population in order for it to grow? | the birth rate becomes higher than the death rate |
| What is happening in a population as it decreases? | The death rate becomes higher than the birthrate |
| If immigration and emigration numbers remain equal, which is the most important contributing factor to a slowed growth | increased birth rate |
| What are two ways a population can decrease in size? | decreased birth rate and emigration |
| When individuals in a population reproduce at a constant rate, it is called | exponential growth |
| The various growth phases through which most populations go are represented on a(an) | logistic growth curve |
| As resources in a population become less available, the population | reaches carrying capacity |
| What factor does not contribute to an exponential growth rate in a given population? | reduced resources |
| In a logistic growth curve, exponential growth is the phase in which the population | reaches carrying capacity |
| A biotic or an abiotic resource in the environment that cause population size to decrease is a | limiting factor |
| What is not a limiting factor? | immigration |
| What is not likely to be a limiting factor on the sea otter population? | drought |
| What will reduce competition within a species' population? | higher population density |
| If a population grows larger than the carrying capacity of the environment, the | birthrate must fall |
| Water lilies do not grow in desert sand because water availability to these plants in a desert is | NOT a limiting factor, a competition factor, the carrying capacity |
| A limiting nutrient is to ecosystem productivity as a limiting factor is to population | growth rate |
| What is NOT a density-dependent limiting factor | seasonal cycles |
| What is least likely to be affected by a density-dependent limiting factor? | a large, dense population |
| What is a density-independent limiting factor? | earthquake |
| What density-dependent factors other than the predator/prey relationship affected the population of the moose and wolves on Isle Royale? | food availability for the moose and disease for the wolf |
| A disease resulting in the deaths of one third of a dense population of bats in a cave would be a | density-dependent limiting factor |
| What would not be a limiting factor related to population density? | the eruption of a volcano |
| Demography is the scientific study of | human population |
| Demographic transition is change from high birthrates and high death rates to | a low birthrate and a low death rate |
| About 500 years ago, the worlds population started | growing more rapidly |
| Demographic transition begins with changes in society that | lower the death rate |
| The human population experienced exponential growth after | the Industrial Revolution began |
| What country has not completed the demographic transition? | India |
| The anticipated human population by the year 2050 is about | 9 trillion |
| In Rwanda, there are more young children than teenagers, and more teenagers than adults. This age structure indicates a population that | will double in 30 years |
| In countries like India, the human population is growing | exponentially |
| Most of the worldwide human population is growing exponentially because | most countries have not yet completed the demographic transition |
| How can a diagram of a population's age structure predict how it can grow? | It shows how many people are entering the population by birth. |
Created by:
dontstopmeow
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