r-Strategist vs K-Strategist: Reproductive Strategies Quiz and Flashcards

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Questions and Answers

Provide examples of K-strategist organisms.

Deer, lions, and swans

How is the population of K-strategists controlled?

Populations of K-strategists are controlled by density-dependent limiting factors.

What is the reproductive strategy of K-strategists?

To invest a great deal of energy in producing a few offspring that have a good chance of living to reproduce.

What is the typical behavior of K-strategist humans in terms of offspring survival?

Even in countries with high infant mortality, 80 percent of the children survive beyond one year of age, and the majority of these will reach adulthood. Signup and view all the answers

What are some characteristics of r-strategists?

Short life, many offspring, exploit unstable environments, do not reach a carrying capacity Signup and view all the answers

Provide examples of r-strategists.

Bacteria, protozoa, many insects, some small mammals Signup and view all the answers

What is the reproductive strategy of r-strategists?

To expend large amounts of energy producing many offspring but to provide limited care for them Signup and view all the answers

How are r-strategists populations limited?

By density-independent limiting factors Signup and view all the answers

What are some examples of density-independent limiting factors?

Changing weather conditions, habitat loss, events like deep snow or flood Signup and view all the answers

What is a common characteristic of r-strategists?

Expending large amounts of energy producing many offspring Signup and view all the answers

Which factor limits populations of r-strategists?

Density-independent limiting factors Signup and view all the answers

What is a characteristic of the reproductive strategy of r-strategists?

Expending large amounts of energy producing many offspring Signup and view all the answers

What is an example of an r-strategist organism?

Bacteria Signup and view all the answers

Which term best describes the behavior of r-strategists in unstable environments?

Exploiting unstable environments Signup and view all the answers

Which of the following best describes the reproductive strategy of K-strategists?

Investing a great deal of energy in producing a few offspring with good survival chances Signup and view all the answers

What is the primary factor that controls the populations of K-strategists?

Availability of resources Signup and view all the answers

Which of the following organisms is an example of an r-strategist?

Dandelions Signup and view all the answers

What is a defining characteristic of K-strategists in terms of offspring production?

Long gestation period and few offspring Signup and view all the answers

How do r-strategists generally respond to fluctuating environmental conditions?

By experiencing population booms and busts in response to changes Signup and view all the answers

Study Notes

K-Strategists

Examples of K-strategist organisms include humans, elephants, and whales
Population control is primarily through density-dependent factors, such as competition for resources and predation
Reproductive strategy involves producing few, high-investment offspring with a high probability of survival
Typical behavior of K-strategist humans involves investing heavily in offspring survival, with high parental care and investment

R-Strategists

Examples of r-strategist organisms include bacteria, insects, and fish
Characteristics of r-strategists include high reproductive rates, many offspring, and low parental investment
Reproductive strategy involves producing many, low-investment offspring with a low probability of survival
Populations are limited by density-independent factors, such as environmental stress, natural disasters, and climate change
Examples of density-independent limiting factors include drought, floods, and wildfires
A common characteristic of r-strategists is their ability to rapidly adapt to changing environments
Populations are limited by factors such as environmental stress, predation, and competition for resources
A characteristic of the reproductive strategy of r-strategists is their ability to produce many offspring quickly
An example of an r-strategist organism is a bacterium, which can produce many offspring rapidly in a short period of time
The term "opportunistic" best describes the behavior of r-strategists in unstable environments
The reproductive strategy of K-strategists is best described as "high-investment"
The primary factor that controls the populations of K-strategists is density-dependent factors
An example of an r-strategist organism is a cockroach, which can produce many offspring quickly
A defining characteristic of K-strategists is their production of few, high-quality offspring
R-strategists generally respond to fluctuating environmental conditions by rapidly adapting and producing many offspring

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Description

Learn about the two broad categories of species based on their reproductive strategies: K-strategists and r-strategists. Understand the characteristics and behaviors of K-strategists, including their population stability, environment, size, offspring production, and parental care.

Reproductive Strategies: K-strategists vs r-strategists