Question 1

All of the members of an interbreeding group of organisms in a local area make up a(n):

Accepted Answer

A population refers to all the members of a particular species living in a particular area and interbreeding with each other. Choice B, ecosystem, refers to a community of living organisms interacting with each other and their physical environment. Choice C, race, is not a biological term and is not applicable in a scientific context. Choice D, community, refers to all the interacting populations in a particular area, regardless of whether they interbreed.

Question 2

A tropical forest and desert would be examples of:

Accepted Answer

Biomes are large geographical regions that have distinct climate, vegetation, and animal life. Tropical forests and deserts are both examples of biomes. Communities are interacting populations of different species living in the same area. Biosphere refers to the part of the Earth where life exists. Populations are groups of individuals of the same species living in the same area. Ecosystems are communities of living organisms together with their physical and chemical environment.

Question 3

______________ are the fundamental units of ecology.

Accepted Answer

Ecosystems

Question 4

A _____________ ecologist would be interested in how biological communities interact with their physical environment.

Accepted Answer

The answer of A _____________ ecologist would be interested in...

Question 5

Which type of symbiosis would exist between a tapeworm living in a human host using its nutrients for its own gain and detriment to the host?

Accepted Answer

In parasitism, one organism (the parasite) benefits while the other organism (the host) is harmed. In this scenario, the tapeworm is benefiting by using the nutrients of the human host for its own survival, while the human is being harmed by the negative effects of the tapeworm's presence.

Question 6

From the list that follows choose the adaptation characteristic of K-selected populations.

Accepted Answer

K-selected populations have adapted to stable and predictable environments with limited resources. They exhibit a slow life history strategy, which includes a late age of first reproduction, longer lifespan, and parental care, such as protecting and providing food for offspring. This strategy allows for the production of fewer, but better-quality offspring that have higher chances of survival in a competitive environment. Short lifespan, high mortality rate, and little to no parental care are characteristics of r-selected populations, which are adapted to unpredictable and variable environments with abundant resources.

Question 7

A community and the nonliving factors with which it interacts is called a(n):

Accepted Answer

An ecosystem refers to the community of living organisms interacting with each other and with the nonliving components of their environment. This includes interactions between plants, animals, microorganisms, air, soil, water, and sunlight. Biomes refer to large geographic areas with similar climate conditions, while the biosphere refers to the global ecosystem comprising all living organisms and their interactions with the environment. Community refers to the group of populations of different species living together in a specific area, and population refers to a group of individuals of the same species living in the same area.

Question 8

Major terrestrial assemblages with similarly adapted plants,animals,and microorganisms that occur over wide geographical areas with distinct physical characteristics are referred to as ______________.

Accepted Answer

The answer of Major terrestrial assemblages with similarly adapted plants,animals,and...

Question 9

_______________ is the consuming of one organism by another.

Accepted Answer

The answer of _______________ is the consuming of one organism...

Question 10

A symbiotic relationship in which both species benefit is called ___________.

Accepted Answer

The answer of A symbiotic relationship in which both species...

Question 11

When the growth rate of a population tapers off at a certain point and remains at the same point indefinitely,the population is said to have reached the:

Accepted Answer

The concept of carrying capacity suggests that every environment has a maximum number of individuals that it can support based on factors like food availability, space, and disease. When the population reaches this carrying capacity, the growth rate evens out, and the population remains relatively stable.

Question 12

When a population reaches the carrying capacity of its habitat,the effects of crowding can be felt.Which of the following is NOT a density-dependent effect?

Accepted Answer

An increased rate of reproduction is not a density-dependent effect, as it is not affected by the density of the population. Other factors, such as availability of resources, may affect the rate of reproduction, but they are not dependent on the density of the population. The other three options (increased migration, increased time spent searching for food, and increased aggression) are all density-dependent effects, as they are more likely to occur when the population is crowded and resources are scarce.

Question 13

Populations of different species that live together in the same place are called ________.

Accepted Answer

The answer of Populations of different species that live together...

Question 14

The term "ecology" was first used by:

Accepted Answer

Ernst Haeckel, a German biologist, was the first to use the term "ecology" in 1866, defining it as the study of the relationships between organisms and their environment.

Question 15

When population growth rate = rN,this type of growth can be called:

Accepted Answer

The equation rN represents exponential growth, where r is the rate of increase and N is the current population size. Logistic growth would include a carrying capacity factor, represented by the equation dN/dt = rN((K-N)/K). Sigmoid growth is another term for logistic growth, so it is not the best choice. Growth at the carrying capacity would not have a rate of increase factor, so it would not be represented by the equation rN.

Question 16

A type of symbiosis in which one species benefits from the relationship while the other neither benefits nor is harmed is called:

Accepted Answer

Commensalism is a type of symbiotic relationship in which one species benefits from the association, while the other remains unaffected. The term commensalism is derived from the Latin word com- meaning "together," and mensa, meaning "table," which implies the sharing of resources. The species that benefits from this relationship is called the commensal, while the other is known as the host. In such relationships, the commensal may use the host as a means of transportation, or it may use the host's habitat for shelter or food, without causing any harm to the host. Examples of commensalism include certain species of birds nesting in trees, the remora fish swimming beneath sharks, and barnacles attaching themselves to whales.

Question 17

A biome is a community and the nonliving factors with which it interacts.

Accepted Answer

A biome is a large geographic area characterized by specific climate conditions and particular types of plants and animals, not a community and nonliving factors.

Question 18

Predators can drive their prey to extinction unless the prey has:

Accepted Answer

Refuges provide a safe place for prey to hide from predators and avoid being consumed, allowing them to survive and potentially rebound in population size. Without refuges, predators can continually consume the prey, eventually leading to extinction. Better genes, the ability to turn the tables on the predator, and stopping competition for resources may all be helpful traits for prey survival, but none of these options guarantee survival in the face of predatory pressure.

Question 19

The rate at which a population can increase when food and habitat are limitless is called:

Accepted Answer

The rate at which a population can increase when food and habitat are limitless is called the biotic potential. Option D is the best choice because it explicitly mentions biotic potential. Option A (population expansion) is too broad and does not specifically address unlimited food and habitat. Option B (sigmoid growth) and C (logistic growth) refer to specific growth models, but do not directly relate to the concept of biotic potential.

Question 20

All of the different kinds of interacting organisms living within a certain area make up a:

Accepted Answer

A community is defined as all of the different species living within a certain area and interacting with each other. A population refers to all individuals of the same species living within a specific area. An ecosystem includes both living organisms and their physical environment. A species refers to a group of organisms that can interbreed and produce viable offspring.

Quiz 35: Populations and Communities

All of the members of an interbreeding group of organisms in a local area make up a(n) :