Which statement explains how geographic isolation causes speciation?
How Does Geographic Isolation Cause Speciation? When a population is separated because of a geographic feature, like distance, a canyon, a river, or a mountain range, those two subgroups of the population are no longer able to reproduce together.
Which of the following best predicts the impact on the lizard species?
Which of the following best predicts the impact on the lizard species if there is a gradual increase in the average temperatures found in both the lowlands and mountains in this region? Some lizards will migrate to new habitats in the mountains and become isolated, leading to allopatric speciation.
Which of the following best describes what occurred during the periods indicated by the arrow?
Which of the following best describes what occurred during the periods indicated by the arrows? Natural selection acted on variation that was present in both populations A and B, and the lack of gene flow eventually led to the formation of two new species.
Which of the following principles best justifies a claim that cheetahs?
Which of the following principles best justifies a claim that cheetahs, compared to other large cats, have a relatively low resilience to environmental perturbations? Populations with little genetic diversity are less likely to contain individuals that can withstand different selective pressures.
How does reproductive isolation differ in sympatric modes and allopatric modes of speciation?
In allopatric speciation, groups become reproductively isolated and diverge due to a geographical barrier. In sympatric speciation, reproductive isolation and divergence occur without geographical barriers—for example, by polyploidy.
What is the significance of the process of speciation to change in populations from generation to generation?
Through this process of natural selection, favorable traits are transmitted through generations. Natural selection can lead to speciation, where one species gives rise to a new and distinctly different species. It is one of the processes that drives evolution and helps to explain the diversity of life on Earth.
Which of the following best describes a consequence of having no bacteria and fungi in the food web?
Which of the following best describes a consequence of having no bacteria and fungi in the food web? Grasses will have no direct access to chemical components recycled from dead organisms.
Why does cold weather affect reptiles more than birds and mammals?
Because birds and mammals regulate their own body temperatures, they don't have to adjust their behavior according to the outside temperature as dramatically as cold-blooded animals.
How can I stop my menstruation?
How to stop your period
- Birth control pills. With a lot of different brands and options, birth control pills are widely used to prevent pregnancy. …
- Intrauterine devices (IUDs) …
- Vaginal rings and patches. …
- Shots. …
- Implants.
Apr 4, 2022
How does gene flow affect biodiversity?
High gene flow in a pathogen increases the size of the population and of the geographical area in which its genetic material occurs. Therefore, pathogens that show a high level of gene flow generally have greater genetic diversity than pathogens that show a low level of gene flow.
Which of the following represents an alternate hypothesis tested by this experiment with regard to the population sizes of Henslow’s sparrows?
Which of the following represents an alternate hypothesis tested by this experiment with regard to the population sizes of Henslow's sparrows? Controlled fires in counties 4 and 5 will lead to an increase in the sparrow population.
How do Prezygotic and postzygotic mechanisms impact speciation?
When prezygotic isolation mechanisms fail to keep species in reproductive isolation from each other, the postzygotic isolations will take over and ensure that speciation is the preferred route for evolution and diversity among species will continue to increase as natural selection acts.
How does adaptive radiation explain the diversification?
Adaptive radiation theory predicts that the proliferation of phylogenetic and ecological diversity within a lineage results from the exposition of a single ancestor to multiple episodes of divergent natural selection (1, 2).
What causes the reproductive isolation that can lead to speciation quizlet?
How can reproductive isolation lead to speciation? If popultations cannot mate successfully with one another, genetic differences may accumulate in the populations. Over time, the populations may become so different that they become different species.
What is the major difference between bacteria and fungi in terms of their decomposing function?
Difference Between Bacteria and Fungi
| Bacteria | Fungi |
|---|---|
| Absent, except in mycoplasma | Present |
| Nutrition mode | |
| Autotrophs, mostly heterotrophs | Heterotrophs feed on dead and decaying matter |
| Reproduction mode |
Which statement best describes how bacteria recycle matter in an ecosystem?
What best describes the role of bacteria in an ecosystem? Bacteria break down organic debris to recycle nutrients in the ecosystem.
Which group of vertebrates can maintain a constant body temperature?
endotherm, so-called warm-blooded animals; that is, those that maintain a constant body temperature independent of the environment. The endotherms primarily include the birds and mammals; however, some fish are also endothermic.
What animal has scaly skin absorb heat?
Reptiles share many traits with other classes of animals, but they are the only animals with the following combination of traits: skin covered with a sheet of scales; ectothermic; and young that look like miniature adults (most hatched from eggs, but some born live).
How do you use tampons?
Tampon Safety Tips
- Follow all labeled directions. …
- Wash your hands before and after using a tampon. …
- Only use tampons when you have your period. …
- Change each tampon every 4 to 8 hours. …
- Use the lowest absorbency tampon needed. …
- Contact your health care provider if you have pain, fever or other unusual symptoms.
Can I swim on my period?
Yes, you can swim on your period. It's safe to hit the water on your period, as long as you wear a tampon or menstrual cup while you're swimming. Read on for some facts about swimming on your period and what period products can help (and which ones you should probably avoid altogether).
How can habitat fragmentation and genetic diversity impact biodiversity?
Habitat fragmentation affects biodiversity by increasing isolation between populations and decreasing effective population size, which alters inbreeding and genetic drift within populations, as well as gene-flow frequency between populations3,4,5. This mechanism can be explained by island biogeography theory6,7.
How does reducing gene flow cause speciation apex?
Reduction of gene flow causes speciation because the populations with reduced gene flow both begin to evolve independently.
Which of the following developments during the mid to late 1910s could best be used as evidence to refute the argument made in the excerpt?
Which of the following developments during the mid-to-late 1910s could best be used as evidence to refute the argument made in the excerpt? The economic situation of many African Americans in urban areas improved.
Which of the following best illustrates the change in the frequencies of the A and A alleles?
Which of the following best illustrates the change in the frequencies of the A and a alleles from generation 1 to generation 2 and to future generations, assuming Hardy-Weinberg equilibrium is present after generation 1 ? Future generations will eventually completely lose the a allele from the gene pool.
How does reproductive isolation differ in sympatric modes and Allopatric modes of speciation?
In allopatric speciation, groups become reproductively isolated and diverge due to a geographical barrier. In sympatric speciation, reproductive isolation and divergence occur without geographical barriers—for example, by polyploidy.
How is reproductive isolation important for speciation reproductive isolation?
The mechanisms of reproductive isolation are a collection of evolutionary mechanisms, behaviors and physiological processes critical for speciation. They prevent members of different species from producing offspring, or ensure that any offspring are sterile.
How can morphological innovations trigger adaptive radiations?
Why can morphological innovations trigger adaptive radiations? They allow organisms to exploit resources in new ways. They allow organisms to exploit resources that are not being used by other organisms.
How can the success of one group of organisms promote the adaptive radiation of a second group?
How can the success of one group of organisms promote the adaptive radiation of a second group? paedomorphosis. due not so much to the genes themselves, but rather in how genes are expressed during development. by altering the expression of a developmental gene in some parts of the body but not others.
How did geographical isolation affect the diversity Darwin observed in the Galapagos finches?
Q: How did geographic isolation affect the diversity Darwin observed in Galapagos finches? The geographic isolation of the finches on different islands meant that each island's environment selected for traits that were beneficial on that particular island.
What is the difference between prokaryotic cell and eukaryotic cell?
The defining characteristic feature that distinguishes between prokaryotic and eukaryotic cell is the nucleus. In prokaryotic cells, the true nucleus is absent, moreover, membrane-bound organelles are present only in eukaryotic cells.