This kettle lakeformed 14,000 yearsago when a glacierthat covered thesurrounding areamelted. Initiallydevoid of animallife, over time thelake was colonizedby invertebratesand other animals.Hypothesize howmutation, naturalselection, geneticdrift, and gene flowmay have affectedpopulations thatcolonized the lake.

This kettle lakeformed 14,000 yearsago when a glacierthat covered thesurrounding areamelted. Initiallydevoid of animallife, over time thelake was colonizedby invertebratesand other animals.Hypothesize howmutation, naturalselection, geneticdrift, and gene flowmay have affectedpopulations thatcolonized the lake.

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter18: Life's Origin And Early Evolution

Section: Chapter Questions

Problem 14SA: During the Precambrian, _______. a. atmospheric oxygen concentration declined b. bacteria, archaea,...

See similar textbooks

Similar questions

Perhaps 98 percent to 99 percent of all species that have ever existed areextinct. Nearly all went extinct long before humans arrived on the scene. Whyshould we be concerned about the extinction of organisms today?
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 diversity of modern vertebrates was shaped in partby mass extinctions. The most severe extinction eventwe know of occured at the border between the Permianand Triassic periods about 250 million years ago. Anestimated 96 percent of the marine species and 70 percentof land species disappeared in what is sometimes called“The Great Dying.” The cause of this mass extinctionremains under investigation. Suggested causes includean asteroid impact, extreme volcanic activity, or a sudden release of carbon dioxide from deposits on the sea floor. Which groups of vertebrates were present when this mass extinction event occurred? Which evolvedafterward?
Which event in Earth’s historyeventually lead to the evolution of multicellular lifeforms?
The Gulf of St. Lawrence is home to the beluga whalesThere once were thousands of belugas in this popula tion, but now there are fewer than 1000 whales. High levels of organic chemicals have been found in the bod ies of dead whales. Describe how bioaccumulation and biomagnification have contributed to harmingthe be luga whales.
Hundreds of millions of years ago, Earth’s landmasses were joinedinto one supercontinent, Pangaea. If Pangaea had never broken up, doyou think there would be more biodiversity, less biodiversity, or thesame amount of biodiversity as today? Explain your answer.
WRITE ABOUT A THEME: INTERACTIONS Animal life changedgreatly during the Cambrian explosion, with some groupsexpanding in diversity and others declining. Write a shortessay (100–150 words) interpreting these events as feedbackregulation at the level of the biological community
This tropical area that existed 37-29mya provided was home to many various species, including several primate species, including Parapithecus. a.Rukwa Rift Basin b.Hubei Province c. Fayum
Outline the major events and changes in species diversity duringthe Paleozoic, Mesozoic, and Cenozoic eras.
How do we know when oceans were first present on Earth?Why is the presence of oceans significant to the origins anddiversification of life?
Afish maturing late with large body size and producing many small offspringwould be said to have a(n):a.periodic life history.b.opportunistic life history.c.equilibrium life history.d.precocial life history.e.stress-tolerant life history.
What major climatic and biological events happened during thePleistocene?