Small-beaked birds fed Large-beaked birds could crack hard seeds. efficiently on soft seeds. Blue bars indicate the young birds that died. 60 No birds with beaks of intermediate size survived because 50 they fed inefficiently on both hard and 40 soft seeds. 30 20 10 10 12 14 16 18 Width of lower beak (mm) Some small- and large-beaked young birds (red bars) survived the dry season. Number of birds

Small-beaked birds fed Large-beaked birds could crack hard seeds. efficiently on soft seeds. Blue bars indicate the young birds that died. 60 No birds with beaks of intermediate size survived because 50 they fed inefficiently on both hard and 40 soft seeds. 30 20 10 10 12 14 16 18 Width of lower beak (mm) Some small- and large-beaked young birds (red bars) survived the dry season. Number of birds

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

Chapter43: Animal Behavior

Section: Chapter Questions

Problem 3CT: European cuckoos and North American brown-headed cowbirds are not dose relatives, but both lay their...

See similar textbooks

Similar questions

4. Bird guides once listed the myrtle warbler and Audubon’swarbler as distinct species. Recently, these birds have beenclassified as eastern and western forms of a single species,the yellow-rumped warbler. Which of the following piecesof evidence, if true, would be cause for this reclassification?(A) The two forms interbreed often in nature, and theiroffspring survive and reproduce well.(B) The two forms live in similar habitats and have similar foodrequirements.(C) The two forms have many genes in common.(D) The two forms are very similar in appearance.
Explain how the three major types of deserts differin their climate and vegetation. Why are desert ecosystems vulnerable to long-term damage? How dodesert plants and animals survive? Explain how thethree major types of grasslands differ in their climateand vegetation. What is a savanna? Explain howsavanna animals survive seasonal variations in rainfall (Core Case Study). Why is the elephant an important component of the African savanna? DescribeTuy Sereivathana’s efforts to prevent elephants frombecoming extinct in Cambodia. Why have manyof the world’s temperate grasslands disappeared?Describe Arctic tundra and define permafrost?Explain how the three major types of forests differin their climate and vegetation. Why is biodiversityso high in tropical rain forests? Why do most soils intropical rain forests hold few plant nutrients. Whydo temperate deciduous forests typically have a thicklayer of decaying litter? What are coastal coniferousor temperate rain forests? How do most species…
Bluebirds are songbirds that, like wood ducks, nest in cavities in trees. European house sparrows, which have been introduced to North America, also nest in such cavities. Explain how the arrival of the house sparrows affected the carrying capacity for bluebirds. What affect would you expect this change have on the number of bluebirds?
How munch bigger is feral cat compare to main coon cat? Are they really big as bobcat? If main coins were feral Will they be huge?
1) Think back to the example of ovenbird evoluon in South America. Ovenbirds are a diverse family of small, insect-eang birds that live mainly in South America. Different ovenbird species have adapted to rocky ocean shorelines, snowy mountains, scorched deserts and tropical rainforests. Like finches, ovenbirds have a variety of beak sizes and shapes, an important indicator of food preference that makes them ideal for studying evoluon. In ovenbirds, "some [beaks] are long and down-curved, like a scythe, for probing into crevices in tree bark and others have short dagger-like bills." What conclusions did the researchers reach? A) ovenbirds are diverse because they do not share any common ancestors B) ovenbirds because successful because they are not native to the area and could easily colonize the area C) birds have different beaks that help them exploit different resources and avoid competition 2) One ant species from Africa is best at competing for space, but is worse at colonizing a…
Activity 3: DIFFERENCES IN SPECIESResearch 5 similar species with different characteristics.Example: Gartner snakes live One lives in waterin the same regionOne lives in land
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?
Feral cat in wild compared to domestic cat are they larger or same size? Feral cats are they tougher then domestic cats for predators like bobcats or raccoons or possum or skunks or weasel? If feral cat has litter how they defend the litter from predators like dogs gain pack to surrive as cats won’t?
Part A) A biologist notices that the same species of Tortoise exists in Texas and Mexico.Yet these tortoises have somewhat different life histories. This is probably due to the diverse array of__that each tortoise has with different components its own environment.a. interactionsb. conversationsc. adaptationsd. all of thesePartB.). If water amounts and food production capabilities decrease, what can happen to carrying capacity?a. increase b. decreasePart C. Alabama should be a desert but it is a lush green environment. What keeps us from being so dry?a. Hadley Cellsb. Ocean Gyresc. Mountainsd. all of the above
Look at your feet. What feature of the arrangement ofyour toes provides evidence of an evolutionary history thatinvolved a tree-dwelling lifestyle?
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?
Can an insectoutbreak threatena forest’s abilityto absorb CO2 fromthe atmosphere?