The Great Divide When the Isthmus of Panama closed about 3 million years ago, it created a land bridge between North and South America. However, aquatic species that were on either side of the land bridge were suddenly isolated from one another. One such species was the snapping shrimp. Though the shrimp looked exactly the same, males from one side of the Isthmus would snap aggressively at the females from the other rather than courting them. 6. After generations of living on separate sides of the Isthmus, snapping shrimp populations would have been considered allopatric. O True FSBC171902 O False

The Great Divide When the Isthmus of Panama closed about 3 million years ago, it created a land bridge between North and South America. However, aquatic species that were on either side of the land bridge were suddenly isolated from one another. One such species was the snapping shrimp. Though the shrimp looked exactly the same, males from one side of the Isthmus would snap aggressively at the females from the other rather than courting them. 6. After generations of living on separate sides of the Isthmus, snapping shrimp populations would have been considered allopatric. O True FSBC171902 O False

Biology: The Unity and Diversity of Life (MindTap Course List)

15th Edition

ISBN:9781337408332

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter44: Population Ecology

Section: Chapter Questions

Problem 1DAA: Iguana Decline In 1987, Martin Wikelski began a long-term study of marine iguanas in the Galpagos...

See similar textbooks

Similar questions

Iguana Decline In 1987, Martin Wikelski began a long-term study of marine iguanas in the Galpagos Islands. He marked iguanas on two islandsGenovesa and Santa Feand collected data on how their body size, survival, and reproductive rates varied over time. He found that because iguanas eat algae and have no predators, deaths usually result from food shortages, disease, or old age. In January 2001, an oil tanker ran aground and leaked a small amount of oil into the waters near Santa Fe. FIGURE 44.3 shows the number of marked iguanas that Wikelski and his team counted in their study populations just before the spill and about a year later. FIGURE 44.3 Shifting numbers of marked marine iguanas on two Galpagos islands. An oil spill occurred near Santa Fe just after the January 2001 census (orange bars). A second census was carried out in December 2001 (green bars). Which island had more marked iguanas at the time of the first census?
Bioaccumlation in tuna Bluefin tuna are among the fishes that were exposed to radioactive material released into the sea by the damaged Fukushima nuclear power plant (Section 47.1). These tuna breed in the western Pacific, and some migrate to the Eastern Pacific when they are 1 to 2 years old. Daniel Madigan suspected that migrating tuna would transport radioactive material to the waters off the coast of California. To test this hypothesis, he and his collaborators analyzed the concentration of cesium radioisotopes (137Cs and 134Cs) in bluefin tuna and yellowfin tuna caught near San Diego in August 2011. Yellowfin tuna do not cross the Pacific; they spend their lives in California's coastal waters. The scientists compared these data with the radioisotope content of bluefin tuna that had been caught near San Diego in 2008. FIGURE 48.9 shows their results. FIGURE 48.9 Radioactive cesium (Cs) concentration in two species of tuna caught along the coast of California. 137Cs has a half-life of 30 years and some persists in the Pacific from weapons testing. 134Cs has a half-life of 2 years and was undetectable in the Pacific prior to the accident at Fukushima. Becquerels (Bq) is a measure of radioactivity. How did the radioisotope content of the bluefin tuna caught in August of 2011 compare to that of bluefins caught in 2008 (before the Fukushima accident)?
All but one species of large birds native to New Zealands tropical forests are now extinct. Numbers of the one surviving species, the kereru (Hemiphaga, novae seelandine), are declining rapidly due to habitat loss, poaching, predation, and interspecies competition that wiped out the other native birds. The keruru is the only remaining dispersal agent for several native tress that produce big seeds and fruits, mainly because it is the only remaining species that can swallow big fruits (left) and expel big seeds whole. One of these trees, the puriri (Vitex lucens), is New Zealands most valued hardwood. Explain, in terms of natural selection, what would happen to puriri trees in New Zealand if the kereru becomes extinct.
The number of species on an island depends on the size of the island and its distance from a mainland. This statement would most likely be made by _____. a. an explorer b. a biogeographer c. a geologist d. a philosopher
Which scenario would be a moder nexample of Lamarckianismm? A strain of houseflies resistant to insecticides emrges Squirrels separated by a river are found to be unable to interbreed Snails are found to have thicker shells generations after the introduction of a predator A son is bornw ith a portion of his right index finger mssing -- the same portion that was severed from his father's hand in an accident.
The Barton Springs salamander is an endangered species found only inthree adjacent springs in the city of Austin, Texas. There is growingconcern that a chemical spill on a nearby freeway could pollute thespring and wipe out the species. To provide a source of salamanders torepopulate the spring in the event of such a catastrophe, a proposal hasbeen made to establish a captive breeding population of the salamanderin a local zoo. You are asked to provide a plan for the establishment ofthis captive breeding population, with the goal of maintaining as muchof the genetic variation of the species as possible. What factors mightcause loss of genetic variation in the establishment of the captivepopulation? How could loss of such variation be prevented? With theassumption that only a limited number of salamanders can bemaintained in captivity, what procedures should be instituted to ensurethe long-term maintenance of as much variation as possible?
was the invasive species iñtroduced to the ecosystem. resouce n aa ecousteon as well as thieaten numan How has the biodiversity of the ecosystem been impacted with the introduction of the invasive species? Identify solutions to control the invasive species and explain their effectiveness. Africanized Bees Explain how was the invasive species introduced to the ecosystem. when queern bees mated with native h Africanized E honey bees dhd made How has the biodiversity of the ecosystem been impacted with the introduction of the U.S in
Is it feasible for animals and the environment to continue evolving or do they eventually become endangered species and extinct eventuallly as thousanda of years pass by?
Species adapt better and faster if they Try harder O Wish for more adaptations O Plan more thoroughly O None of the above
Browchare Organis Pooulation Connunty A group of gazelles would fall under which level of organization? 454481b426c8195b7188531dd0ee43b6.webm 66 KB al Organism O b Population Community Ecosystem Question 3 (2 points)
EVOLUTION CONNECTION The fossil record indicates that therehave been five mass extinction events in the past 500 millionyears (see Concept 25.4). Many ecologists think we are on theverge of entering a sixth mass extinction event. Briefly discussthe history of mass extinctions and the length of time it typicallytakes for species diversity to recover through the process ofevolution. Explain why this should motivate us to slow theloss of biodiversity today.
The Taamanian tiger ahown is extinct Which sentence best describes what this means? (SC.5.L.15.1) O The Tasmanian tiger was able to change to survive ina new environment, o The Tasmanian tiger had many useful adaptations to helped It to live. O The Tasmanian tiger could not survive and will not be seen anymore. O The Tasmanian tiger has had many of its habitats destroyed.