Biodiversity and Evolution
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Questions and Answers

What is the primary mechanism that drives the evolution of species according to Darwin?

  • Mutation
  • Genetic drift
  • Gene flow
  • Natural selection (correct)

What is the role of the environment in the process of natural selection?

  • Filtering changes and variations in traits (correct)
  • Increasing the mutation rate
  • Introducing new traits to a population
  • Determining the rate of genetic drift

What is the result of changes in the genetic code of an organism?

  • An increase in the mutation rate
  • A change in the characteristics and traits of the organism (correct)
  • A decrease in the population size
  • A loss of genetic information

What is the definition of evolution?

<p>Any change in the inheritable traits within a population across generations (C)</p> Signup and view all the answers

Why do organisms possessing adaptive characteristics have a better chance to survive and reproduce?

<p>Because they are better suited to their environment (A)</p> Signup and view all the answers

What is the result of favored traits being expressed in a population?

<p>Unfavored traits becoming less common (A)</p> Signup and view all the answers

What was one of the themes stressed by Jean-Baptiste Lamarck in his work on organic evolution?

<p>The adaptation of animals to environmental changes (C)</p> Signup and view all the answers

What did Charles Darwin’s theory of evolution build upon?

<p>Lamarck’s ideas on the relationship of environment and evolution (D)</p> Signup and view all the answers

What is the primary purpose of the Linnaean classification system?

<p>To provide a universal naming system for organisms (A)</p> Signup and view all the answers

What was one of the key factors that made it probable for the 'organic movement' in animals, according to Lamarck?

<p>The movement of bodies and their different parts (A)</p> Signup and view all the answers

What is one of the key differences between Lamarck’s and Darwin’s theories of evolution?

<p>Lamarck stressed the role of environment, while Darwin stressed natural selection (C)</p> Signup and view all the answers

What is the primary characteristic used to identify species according to the morphological species concept?

<p>Measurable phenotypic traits (B)</p> Signup and view all the answers

What is the process by which a single species rapidly diversifies into new forms in response to changes in the environment?

<p>Adaptive radiation (C)</p> Signup and view all the answers

What is the main reason why Darwin’s theory of evolution was groundbreaking?

<p>It challenged the theory of special creation (A)</p> Signup and view all the answers

What is one of the key implications of understanding biodiversity and evolution?

<p>It helps in understanding the structure and function of ecosystems (B)</p> Signup and view all the answers

What is the lowest taxonomic rank in the biological classification of living things?

<p>Species (D)</p> Signup and view all the answers

What is the primary characteristic used to identify species according to the biological species concept?

<p>Ability to interbreed (D)</p> Signup and view all the answers

What is the primary characteristic used to identify species according to the polygenic species concept?

<p>Unique genetic history (A)</p> Signup and view all the answers

What is the primary function of decomposers in an ecosystem?

<p>To break down dead organic matter (B)</p> Signup and view all the answers

What is the term used to describe the position an organism occupies in a food chain?

<p>Trophic level (A)</p> Signup and view all the answers

What type of consumer is a grasshopper that feeds on leaves from a cornstalk?

<p>Primary consumer (A)</p> Signup and view all the answers

What is the main characteristic of a secondary consumer in a food chain?

<p>Feeds on primary consumers (D)</p> Signup and view all the answers

What type of organism is a maya bird that feeds on a grasshopper?

<p>Secondary consumer (D)</p> Signup and view all the answers

What determines the trophic level of a scavenger in a food chain?

<p>What it consumes (C)</p> Signup and view all the answers

What is the primary driver of the formation of new species, according to the gradualism model?

<p>Gradual accumulation of adaptations to the environment over time (B)</p> Signup and view all the answers

What occurs in periods of punctuated equilibrium, according to the theory?

<p>Long periods of little change, followed by rapid changes through mutations (B)</p> Signup and view all the answers

What is the term for changes in the DNA that can be passed on to succeeding generations?

<p>Mutation (C)</p> Signup and view all the answers

What is the primary focus of this chapter, according to the introduction?

<p>The connection between living and nonliving things in an ecosystem (B)</p> Signup and view all the answers

What is the ultimate result of the gradual accumulation of adaptations to the environment, according to the gradualism model?

<p>The formation of new species (D)</p> Signup and view all the answers

What is the role of the environment in shaping the evolution and behavior of organisms, according to the chapter?

<p>The environment plays a significant role in shaping the evolution and behavior of organisms (C)</p> Signup and view all the answers

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