Quick Answer: What Is R Vs K?

Are weeds R-selected?

Examples of r-selected species include pest organisms, such as rodents, insects, and weeds..

Why are elephants K-selected species?

(a) Elephants are considered K-selected species as they live long, mature late, and provide long-term parental care to few offspring. Oak trees produce many offspring that do not receive parental care, but are considered K-selected species based on longevity and late maturation.

Are turtles R or K-selected?

Plants such as dandelions are another good example of an r-selected species. … Sea turtles are a good example of a species that fits somewhere in the middle. The produce many eggs and do not care for their offspring once the eggs have been laid, but turtles live very long lives.

Are cats r selected species?

r selected species are also known as r strategists and opportunistic species. They practice big-bang reproduction, AKA semelparity. … Cats are r-selected compared to humans, and K-selected compared to cockroaches.

Can humans be r-selected?

These species are characterized by having only a few offspring but investing high amounts of parental care. Elephants, humans, and bison are all k-selected species. … R-selected species can include mosquitos, mice, and bacteria.

Are K-selected species generalists or specialists?

When environmental conditions change, generalists are able to adapt, but specialists tend to fall victim to extinction much more easily. K-Selected species are species that have a low intrinsic growth rate, which causes the population to increase slowly until it reaches the carrying capacity of the environment.

Are K-selected species opportunists?

Explanation: R-selected or opportunistic species are species that have high growth rates, produce many offspring, and have low survival odds for those many offspring. … Examples of k-selected species include mammals such as humans, dolphins, and rhinos.

Are frogs K strategists?

Frogs produce many eggs, and a fraction live to reproduce themselves. They are an example of r-strategists. “r and K selection.” University of Miami: Department of Biology.

What does the R in R-selected stand for?

reproductionr-selection: On one extreme are the species that are highly r-selected. r is for reproduction. Such a species puts only a small investment of resources into each offspring, but produces many such low effort babies.

What is R and K reproductive strategy?

In the equations describing growth of populations of organisms, r represents the slope of the line representing exponential growth. The letter K represents the carrying capacity of a habitat for members of a given sort of organism.

What is the difference between R and K selective provide an example of AK specialist species and an R specialist species?

The difference between R and K selective is the R selected species live in populations that are highly variable. K selected species live in populations that are at or near equilibrium for long periods of times. An example of a K selective species would be a Lion or Bear and a R selective species would be a fish.

Are Lions R or K-selected?

Common examples of k-strategists species include humans, lions and whales.

What animals are r strategists?

Typical examples of r-species are mice, rabbits, weeds and bacteria, which have a lot of offspring, but a short life expectancy. Examples of organisms undergoing K-selection are tortoises, elephants, people, and sequoia trees: their offspring are few but long-lived.

Are Fish R strategists?

R strategists usually create an abundance of offspring in the hopes that a few will make it. include bacteria, insects, and fish. lessons from their parents. K-selected species include elephants, apes and whales.

What is the R vs K theory?

In ecology, r/K selection theory relates to the selection of combinations of traits in an organism that trade off between quantity and quality of offspring. … In contrast, more stable environments allow parents to confidently invest in one offspring because they are more likely to survive to adulthood.

Are humans K or R?

Both across and within species, r and K strategists differ in a suite of correlated characteristics. Humans are the most K of all. K’s supposedly have a longer gestation period, a higher birthweight, a more delayed sexual maturation, a lower sex drive, and a longer life.

Are dogs K strategists?

Indeed, one can think of a given organism as an “r-strategist” or a “K-strategist” only relative to some other organism; thus statements about r and K selection are invariably comparative. Cats and dogs are r-selected compared to humans, but K-selected compared to mice and rats.

Are invasive species R or K-selected?

Biologists characterize most invasive species as r-selected. … While K-selected species exhibit low mortality, the majority of an r-selected species’ offspring are sure to perish; however, a few are likely to navigate the world successfully, mature and reproduce.