AP Biology : Understanding Ecosystems

Study concepts, example questions & explanations for AP Biology

varsity tutors app store varsity tutors android store

Example Questions

1 2 3 5 Next →

Example Question #41 : Ecology

Which of the following types of seasons best characterize chaparral biomes?

Possible Answers:

Extremely cold winters with low precipitation

Hot dry summers and mild wet winters

Hot dry summers and very cold winters with low precipitation

Hot dry summers

Correct answer:

Hot dry summers and mild wet winters

Explanation:

Chaparral biomes are primarily observed to exist in California. The seasons in chaparral areas include hot dry summers and mild wet winters.

Example Question #41 : Understanding Ecosystems

Which of the following characteristics are exemplary of savanna biomes?

Possible Answers:

All of these

Can be found in Africa and Australia

Seasonal fires

Rainy season and dry season

Correct answer:

All of these

Explanation:

The savanna is a type of biome found in Africa, Australia, South America, and India. The savanna is described as type of grassland ecosystem that has scattered trees and low shrubbery. Savannas have rainy seasons and dry seasons characterized by fires. 

Example Question #41 : Ecology

Which of the following best describes the primary difference between the savanna and temperate grassland biomes?

Possible Answers:

The savanna can be further categorized into prairies and steppes while the temperate grassland cannot

Seasonal fires are important to savanna biodiversity but they are not in temperate grasslands

The savanna is dominated by grasses while the temperate grassland has scattered trees

Seasonal fires are important to temperate grassland biodiversity but they are not in the savanna

Correct answer:

Seasonal fires are important to savanna biodiversity but they are not in temperate grasslands

Explanation:

The key difference between the savanna and temperate grassland biomes is that seasonal fires are very important to savanna biodiversity but not for the temperate grassland’s ecology.

Example Question #41 : Ecology

Which of the following represent the key factors that distinguish biomes from one another?

Possible Answers:

Habitat type

Climate

All of these

Patterns of ecological succession

Correct answer:

All of these

Explanation:

Biomes are characterized by a number of factors including climate, patterns of ecological succession, and habitat type. It is important to note that biomes are not distinguished by genetic or taxonomic patterns of organisms.

Example Question #42 : Ecology

Which of the following is a characteristic that is not used to characterize biomes?

Possible Answers:

Climate

Patterns of ecological succession

Taxonomy and genetic similarities of organisms

Habitat type

Correct answer:

Taxonomy and genetic similarities of organisms

Explanation:

Biomes are characterized by a number of factors including climate, patterns of ecological succession, and habitat type. It is important to note that biomes are not distinguished by genetic or taxonomic patterns of organisms.

Example Question #43 : Ecology

Which of the following is true regarding biome taxonomy?

Possible Answers:

Biomes are only characterized by biotic components

There is only one type of biome characterization of the Earth 

Biomes are characterized by shared abiotic and biotic components

Biomes only describe terrestrial ecosystems

Correct answer:

Biomes are characterized by shared abiotic and biotic components

Explanation:

Biomes are defined as ecosystems with shared abiotic and biotic factors. There are many different characterization schemes regarding biome classifications on Earth; furthermore, biomes encompass both terrestrial and aquatic ecosystems.

Example Question #42 : Ecology

Logistic growth in a population is modeled by the equation:

 

In this equation, what does  represent?

Possible Answers:

Time

The birth rate

The death rate

The fitness of the organisms

The carrying capacity

Correct answer:

The carrying capacity

Explanation:

In exponential growth, the growth rate is modeled as the reproductive rate  times the number of individuals . By adding the term , we arrive at the equation for logistic growth. As  increases, the value of  (and thus of the entire equation) will decrease to the point where . After this, the growth rate will become negative! The result is that the population will be limited to a size of . This limit  is known as the carrying capacity.

Example Question #41 : Ecology

Which of the following includes populations of several different species in an area?

Possible Answers:

Biosphere

Community

Landscape

Ecosystem

Population

Correct answer:

Community

Explanation:

A community includes populations of different species. The study of a community looks at interactions between species, such as competition, symbiotic relationships, or predation. 

Example Question #44 : Ecology

Which law of thermodynamics states that there will always be an increase in entropy due to some energy not being able to be utilized in a reaction and lost from the system?

Possible Answers:

First law

Fourth law

Third law

Zeroth law

Second law

Correct answer:

Second law

Explanation:

The Second Law of Thermodynamics states that during an reaction that some energy will not be completely transferred and will ultimately be lost as heat to increase the entropy of the universe.

1 2 3 5 Next →
Learning Tools by Varsity Tutors