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I want to cry

idk ecology

When individuals in a population reproduce at a constant rate, it is called exponential growth
Which of the following tells you population density? the number of bacteria per square millimeter
Which of the following has a direct role in the nitrogen cycle? a all of the above
The unequal heating of Earth’s surface all of the above
The lowest level of environmental complexity that includes living and nonliving factors is the ecosystem
What does the range of a population tell you that density does not? the areas inhabited by a population
Which of the following is a density-independent limiting factor? earthquake
Which of the following can influence the climate in a small area within a biome? natural features such as a lake
Each of the following is a density-dependent limiting factor EXCEPT seasonal cycles
All of the following factors contribute to Earth’s climate EXCEPT longitude
All of the following are limiting factors EXCEPT immigration
The symbiotic relationship between a flower and the insect that feeds on its nectar is an example of mutualism because the flower provides the insect with food and the insect pollinates the flower.
Nitrogen fixation is carried out primarily by bacteria
In which way does Figure 3–2 differ from a typical model of trophic levels? First-level consumers outnumber producers.
One of the main characteristics of a population is its geographic distribution
The trophic levels in Figure 3–2 illustrate the relative number of individual organisms at each level.
Which of the following descriptions about the organization of an ecosystem is correct? Species make up populations, which make up communities.This is the correct answer.
Which one of the following statements is NOT true of freshwater wetlands? The water in freshwater wetlands is always brackish.
As resources in a population become less available, the population reaches carrying capacity.
The photic zone extends to a depth of about 200 meters.
Which of the following is NOT likely to be a limiting factor on the sea otter population? drought
The movements of energy and nutrients through living systems are different because energy flows in one direction and nutrients recycle.
Which are two ways a population can decrease in size? decreased birthrate and emigration
In a logistic growth curve, exponential growth is the phase in which the population grows quickly
Carbon cycles through the biosphere in all of the following processes EXCEPT transpiration.
A limiting nutrient is to ecosystem productivity as a limiting factor is to population growth rate.
The tendency for warm air to rise and cool air to sink results in global wind patterns.
Most of the energy available to a consumer trophic level is used by organisms for respiration, movement, and reproduction.
The total amount of living tissue within a given trophic level is called the biomass
Demographic transition is change from high birthrates and high death rates to a low birthrate and a low death rate.
Primary succession can begin after a lava flow
If a nutrient is in such short supply in an ecosystem that it affects an animal’s growth, the substance is a limiting nutrient.
Which is most likely to be a limiting nutrient in a freshwater pond? phosphorus
The various growth phases through which most populations go are represented on a(an) logistic growth curve.
When the exponential phase of a logistic growth curve of a population ceases, population growth begins to slow down.
If a population grows larger than the carrying capacity of the environment, the death rate may rise.
A biome is identified by its particular set of abiotic factors and its characteristic ecological community.
Aquatic ecosystems are classified by all of the following EXCEPT organisms that live there.
What is one difference between primary and secondary succession? Secondary succession begins on soil and primary succession begins on newly exposed surfaces.
Which of the following is NOT recycled in the biosphere? energy
Which of the following statements is NOT true about the open ocean? The open ocean begins at the low-tide mark and extends to the end of the continental shelf.
Why must wildlife biologists consider immigration and emigration when studying certain animals? Animals leave the area in which they were born in search of mates, food, and new territories, and other animals arrive from outside a population for the same reason.
How does emigration affect population size? Emigration is the movement of individuals out of a population, and it reduces population size if all other factors are equal.
Describe an important role that pioneer species play in primary succession. In primary succession, pioneer plants help rocks to break up in the process of soil formation and contribute organic material to the forming soil in which plants can grow.
What are greenhouse gases? Greenhouse gases are atmospheric gases, such as carbon dioxide, methane, and water vapor, that trap heat energy.
What is a limiting factor? Give two or three examples. A limiting factor is a factor that causes population growth to decrease, such as competition, drought, predation, or disease.
Created by: lillylulu



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