Table of Contents
Quizlet What Role Would An Owl That Eats A Seed-Eating Mouse Perform In A Food Chain?? What role would an owl that eats a seed-eating mouse perform in a food chain? habitat destruction.
What factor would result in an increased mortality in a population due to increased competition for water quizlet? The environment can’t support a further increase in the population. What factor would result in an increased mortality in a population due to the increased competition for water? Density-dependent factor.
Which of the following statements explains why small populations that have been recently derived from large populations often undergo rapid genetic change? Which of the following statements explains why small populations that have been recently derived from large populations often undergo rapid genetic change? Inbreeding results in a higher rate of genetic mutations. Genetic variation is lost rapidly in small populations due to genetic drift.
What produces gene flow? Gene flow is the movement of genes into or out of a population. Such movement may be due to migration of individual organisms that reproduce in their new populations, or to the movement of gametes (e.g., as a consequence of pollen transfer among plants).
Quizlet What Role Would An Owl That Eats A Seed-Eating Mouse Perform In A Food Chain? – Related Questions
What happens when a population reaches its carrying capacity quizlet?
Describe what happens when a population reaches is carrying capacity in a particular environment. The birth rate may decrease or the death rate may increase, until they are about equal when carrying capacity is reached.
Why is genetic drift stronger in small populations?
Small populations tend to lose genetic diversity more quickly than large populations due to stochastic sampling error (i.e., genetic drift). This is because some versions of a gene can be lost due to random chance, and this is more likely to occur when populations are small.
Why is genetic drift important in small populations?
Genetic drift is more important in small populations because the chances of an allele being lost or fixed in the population are much higher, this is because each individual in a small population represents a larger proportion of the entire population (than in a large population).
How is evolution different in small populations?
Modern Theories of Evolution: Small Population Effects. In small, reproductively isolated populations, special circumstances exist that can produce rapid changes in gene frequencies totally independent of mutation and natural selection. The smaller the population, the more susceptible it is to such random changes.
Which example shows Nonevolutionary change in a population?
Which example shows nonevolutionary change in a population? The number of people diagnosed with colon cancer has increased.
Which situation is an example of behavioral isolation?
Differences in Mating Behaviors
Behavioral isolation occurs when populations of the same species begin to develop different behaviors that are not recognized or preferred by members in another population. The most common example of behavioral differences is mating calls.
How could better health conditions lead to a decrease in population growth?
How could better health conditions lead to a decrease in population growth? If parents know their children may survive to adulthood, they are likely to have fewer children. Maximum populations that are actually larger than the carrying capacity may result.
How are limiting factors related to carrying capacity?
Limiting factors regulate how many organisms live in an ecosystem. Space, food, oxygen, and water are limiting factors. The maximum population size that an ecosystem can support is called carrying capacity. Limiting factors determine carrying capacity.
What two factors does carrying capacity compare?
Carrying capacity, or the maximum number of individuals that an environment can sustain over time without destroying or degrading the environment, is determined by a few key factors: food availability, water, and space.
Why is carrying capacity important in maintaining balance in ecosystems?
When an ideal population is in equilibrium with the carrying capacity of its environment, the birth and death rates are equal, and size of the population does not change. Populations larger than the carrying capacity are not sustainable, and will degrade their habitat. Carrying capacity is never static.
What is a example of gene flow?
Gene flow is the movement of genes from one population to another population. Examples of this include a bee carrying pollen from one flower population to another, or a caribou from one herd mating with members of another herd.
How can gene flow be prevented?
Because gene flow can be facilitated by physical proximity of the populations, gene flow can be restricted by physical barriers separating the populations. Incompatible reproductive behaviors between the individuals of the populations also prevent gene flow.
What are the 2 types of gene flow?
Alternatively, gene flow can take place between two different species through horizontal gene transfer (HGT, also known as lateral gene transfer), such as gene transfer from bacteria or viruses to a higher organism, or gene transfer from an endosymbiont to the host.
What are some factors that cause a population to reach carrying capacity quizlet?
Carry capacity is the maximum number of individuals in a species that an environment can support for the long term. Carrying capacity is limited by limiting factors such as energy, water, oxygen, and nutrients.
What would allow a population to experience exponential growth quizlet?
a population would experience exponential growth if there were no constraints on a population. if your population is limited due to density-dependent and density-independent factors you would see logistic growth.
What is the founder effect example?
The founder effect is a case of genetic drift caused by a small population with limited numbers of individuals breaking away from a parent population. The occurrence of retinitis pigmentosa in the British colony on the Tristan da Cunha islands is an example of the founder effect.
What is genetic drift example?
Genetic drift is a change in the frequency of an allele within a population over time. A population of rabbits can have brown fur and white fur with brown fur being the dominant allele. By random chance, the offspring may all be brown and this could reduce or eliminate the allele for white fur.
Why do small populations become inbred?
Inbreeding: In a small population, closely related individuals are more likely to breed together. The offspring of related parents have a higher number of homozygous loci than the offspring of unrelated parents.
What increases genetic variation?
Gene duplication, mutation, or other processes can produce new genes and alleles and increase genetic variation. New genetic variation can be created within generations in a population, so a population with rapid reproduction rates will probably have high genetic variation.
How does population affect evolution?
Consider population size. On the one hand, adaptive evolution may be more rapid in large populations. First, larger populations produce more mutant individuals per generation, which helps explore more genotypes and find optimal genotypes faster than smaller populations.
Why small populations are most at risk of extinction?
Small populations suffer from inbreeding, an inevitable tendency of mating individuals in a small isolated population to be more closely related than they would be in a larger one. When population size is severely reduced, inbreeding may be the final insult that will cause the remaining population to go extinct.