an insect population lives on trees. over time, more trees with light colored bark grown in their habitat, and the instect population shifts its average color to become lighter so that the insects are better camouflaged when on trees. this is an example of what type of selection

an insect population lives on trees. over time, more trees with light colored bark grown in their habitat, and the instect population shifts its average color to become lighter so that the insects are better camouflaged when on trees. this is an example of what type of selection

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter39: Animal Behavior

Section: Chapter Questions

Problem 1CT

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Ecological adaptations

An ecological adaptation is any morphological, physiological, or behavioral trait of an organism that allows it to survive and reproduce in a habitat or ecosystem. Adaptation is a biological mechanism by which an organism gradually gets more acclimated to its surroundings.

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answers: Disruptive selection, Directional Selection, Stabilizing selection, Hardy-Weinburg selection.

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Consider this example. On a tropical island, there are iguanas that are green, blue, and yellow. The green iguanas can camouflage in the green grass, the yellow iguanas can camouflage in the dry, yellow grass. And the blue iguanas try to run fast to get away from prey. Over time, the blue iguanas disappear on the island, while the green and yellow iguanas survive. What type of natural selection is this? A. Balancing or Stabilizing selection B. Disruptive or Diversifying selection C. Directional selection D. Sexual selection
Which statement is accurate about natural selection? It is a biological process that prevents species from adapting to significant changes in their environments. It is a biological process that leads a population to have a widespread expression of an advantageous trait. It is a biological process that allows a population to have a competitive advantage in many environments. It is a biological process that causes certain traits to be expressed less with each subsequent generation.
Assume you are studying a population of hummingbirds. You discover that the smallest hummingbirds can't keep their eggs warm and those eggs tend to fail. You also discover the largest hummingbirds tend to accidentally crush their eggs, so those eggs fail. The medium-size hummingbirds therefore have the highest fitness. What type of selection would this result in? a. Directional selection b. Sexual selection c. Disruptive selection d. Stabilizing selection
Which type of selection is represented from a population of mice living in the forest where only dark colored fur survive? Disruptive Directional Stabalizing
In a population that had mice ranging in color from very light to very dark, which type of selection would result in a population of mostly dark mice? Group of answer choices Directional selection Disruptive selection Stabilizing selection
In a habitat there are red bugs and green bugs. the birds prefer the taste of red bugs. so soon there are many green bugs and dew red bugs. the green bugs reproduce and make more green bugs and eventually there are no more red bugs. what type of selection is this? give another example of this type of selection
In which of these examples can natural selection act on a trait and cause the population to evolve? A population that is faced with extinction but has no genetic variation A population where a lot of individuals have mutations, but none of the mutations relate to fitness A population with no genetic variation, but where individuals have very high numbers of offspring A population where a few individuals have mutations that allow them to develop traits for producing more offspring than other individuals
Which of the following best states a condition which promotes natural selection of aspecies? Group of answer choices One baby albino alligator, from a nest of 20 eggs, hatches in the Florida Everglades. An ocean ecosystem consists of more algae than fish species. The population of moths in a forest increased from 100 to 150 members. A female cat has a litter of 5 kittens instead of 6.
TRUE/FALSE. Disruptive selection creates alleles that increase genetic diversity in a population. If false explain why and if true explain why
The Galapagos finches' response to changing environmental conditions. Research Notes: (focus on how and why the population changed over time)▪Step by step explanation of how a population can change over time, using your example▪Description of inherited variation within the population▪Explanation of why some individuals isbetter able to survive and produce offspring.▪A description of the adaptation that is being favored by natural selection▪Data to support explanations
Natural selection makes an adaptive trait more common in a population. After many generations, will all individuals in the population have the same adaptive trait?
What type of selection occurs when one extreme population phenotype is favored? Group of answer choices genetic drift directional stabilizing disruptive