Evolutionary Biology: From Darwin to Watson and Crick
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Questions and Answers

What is the term for the directed migration of cells in response to concentration gradients of extracellular signals?

  • Chemotaxis (correct)
  • Retroviruses
  • Mitosis
  • CRISPR

Which mechanism is used by bacteria to remove viral DNA from circular chromosomes?

  • Chemotaxis
  • CRISPR (correct)
  • Mitosis
  • Oncogenes

What are oncogenes?

  • Host cell DNA
  • Virus-derived genes that can cause cancer (correct)
  • Genes responsible for chemotaxis
  • Genes involved in mitosis

How do rattlesnakes use chemical cues to track down prey at night?

<p>By utilizing chemotaxis (D)</p> Signup and view all the answers

What is Pangenesis?

<p>Hypothesis suggesting particles from all parts of the body can collect in the reproductive organs to pass on hereditary information (D)</p> Signup and view all the answers

What is the main characteristic of retroviruses?

<p>Incorporation of genes into the host's chromosomes (C)</p> Signup and view all the answers

What is the main source of variation in traits?

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

Who discovered that some traits are dominant and some are recessive?

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

Which scientist confirmed that genes are made of DNA and proposed the double helix model?

<p>James Watson and Francis Crick (C)</p> Signup and view all the answers

What concept solves Darwin's problem of how heritable particles do not blend?

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

According to the Modern Synthesis, what does natural selection act upon?

<p>'Fitter' phenotypes (C)</p> Signup and view all the answers

What is the process whereby distantly related organisms independently evolve similar traits to adapt to similar necessities called?

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

Which process is responsible for the spread of antibiotic resistance genes among bacteria?

<p>Conjugation in bacteria (A)</p> Signup and view all the answers

What is a significant outcome of serial symbiosis between prokaryotes according to the text?

<p>Creation of more complicated eukaryotic cells (A)</p> Signup and view all the answers

Which event led to the creation of mitochondria and chloroplasts in eukaryotic cells?

<p>Endosymbiosis with bacteria (B)</p> Signup and view all the answers

What is a key characteristic of the transfer of genes through sexual reproduction?

<p>Involves sharing chromosomes with another organism (C)</p> Signup and view all the answers

What process involves the direct contact transfer of DNA from a donor bacterium to a recipient bacterium?

<p>Conjugation in bacteria (B)</p> Signup and view all the answers

How do viruses replicate within host cells?

<p>Utilizing cellular mechanisms of the host cell (B)</p> Signup and view all the answers

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