EBK BIOLOGY:SCIENCE F/LIFE
6th Edition
ISBN: 9780134819167
Author: BELK
Publisher: PEARSON
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Chapter 12, Problem 8LTB
Summary Introduction
Introduction:
The fusion of
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In nature, evolutionary transitions must act on preexisting traits and behaviors because selection does not start from scratch. This is commonly referred to as the ____________ principle.
According to the Hardy-Weinberg Equilibrium Equation, all of the following slow down or stop evolution EXCEPT (choose as many as apply):
Group of answer choices
very small population
very large population
no one leaves or comes into the population
everyone has equal numbers of offspring
there are no mutations
there are lots of mutations
there is non- random mating
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- The theory of evolution is most accurately described as... Just an opinion that some scientists hold about how living things change over time. An educated guess about how species originate. An idea about how acquired characteristics are passed on to subsequent generations. One possible explanation, among several scientific alternatives, about how species have come into existence. An overarching explanation, supported by much evidence, for how populations change over time.arrow_forwardIndicate whether each statement presents an idea of Jean-Baptiste Lamarck, of Charles Darwin, or of Both Scientistarrow_forwardList the premises of evolution by natural selection. What is the inevitable outcome?Variation; heritability; “struggle”/context; differential survival/reproductionarrow_forward
- True or Flase: Evolution through natural selection can NEVER be observed because it happens too slowly for humans to notice.arrow_forwardIndicate the appropriate mechanism(s) of evolution at work in the following: Remember that forces may oppose one another! Choose from: Non-random or Assortative mating Mutation Natural (but non-sexual) selection. etc.) Sexual selection Gene flow (Migration) Kin selection Genetic drift (Founder effect, Bottleneck, Prior to 1970 a population of moths with dark brown coloration blended in well with the trees they live on. Bird predation on the moths is very low in the population. In 1976 a deletion in the genetic code of an individual male moth occurred, resulting in a new color morph (White). The white moth was favored for mating by the wild females, and by 1980 14% of moths in the population exhibited the white color. Jays (birds that feed on moths) in the area could readily see these white moths and, once they had learned to look for them, eliminate the white moths from the population by 1981. Mechanism(s) observed from 1970-1976:arrow_forwardIn the given below option which of the following is not a component of evolution bynatural selection?1. Variation exists within a population.2. Organisms compete for resources.3. Individuals have different reproductive success.4. Organisms adapt due to environmental changes.5. Species are fixed.arrow_forward
- Considering that the plants with the most trichomes were selected to produce seeds in the parent population, which of the following results would you predict for the next generation? (The x-axis indicates the number of trichomes.)arrow_forwardWhat causes variation among a population of living things and How can variation in one generation influence the next generation? Is the variation in a population will be examined as the “raw material” upon which natural selection acts. Why are there so many different kinds of living things? Comparing species that exist today reveals a lot about their relationships to one another and provides evidence of common origins. This session explores the theory of evolution: change in species over time.arrow_forwardConsider the following statements and indicate whether each presents an idea of Jean-Baptiste Lamarck, of Charles Darwin or of both scientists. On the blank before the statement, write L for Lamarck, D for Darwin or B for both. _____ 1) An organism directs its own adaptations because of an inborn urge to be perfect (that is, to be better suited to the environment). _____ 2) Individuals do not evolve, but populations do. _____ 3) Individuals in a population exhibit variation in their traits, such that no two individuals are exactly alike. _____ 4) Many different kinds of living things are adapted to their environment. _____ 5) Members of a population who are better adapted to the environment have higher chances of survival and reproduction. _____ 6) Parents pass on their traits to their offspring. _____ 7) Species change gradually over many generations. _____ 8) Traits that an organism acquired during its lifetime can be transmitted to its offspring.arrow_forward
- Natural selection can be defined as: chance differences in organism traits. the chance for species numbers to increase rapidly. the processes that lead individuals to resemble their parents. the differential survival and reproduction of individuals. the genetic fixation of species.arrow_forwardFrom microbiology need to put in sequential order.arrow_forwardWhich of the following factors are required in order for evolution to occur? a. Individuals within a population must be receptive to change and collectively determine which trait(s) is/are to be modified in subsequent generations b. Genetic variation within a population must exist or have the potential to arise, and shifts in allelic frequencies will take place or have the potential to take place c. Individuals within a population should be able to reproduce effectively (i.e., without barriers to reproduction existing) d. Both A & B e. Both B & Carrow_forward
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GCSE Biology - Adaptations #79; Author: Cognito;https://www.youtube.com/watch?v=tC-u8xcZYSM;License: Standard Youtube License