Lamarck's "inheritance of acquired characteristics" is rejected today because

Answer: Acquired traits during an organism's lifetime are not encoded in its germline DNA, so cannot be inherited Modern biology: heritable changes must alter germline DNA. Most somatic changes are not inherited (with some epigenetic exceptions).

Natural selection requires which of the following?

Answer: Variation, heritability, and differential reproductive success Darwin's three conditions: variation among individuals, heritable traits, and differential survival/reproduction.

AP Biology · Topic 7.1

Introduction to Natural Selection Practice

Part of Natural Selection.(EVO-1.A)

Practice questions

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Sample questions

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Sample 1difficulty 2/5
$Lamarck's "inheritance of acquired characteristics" is rejected today because$
- A
  $Acquired traits during an organism's lifetime are not encoded in its germline DNA, so cannot be inherited$
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- B
  $Acquired traits during an organism's lifetime alter only somatic cells, so cannot influence the offspring's phenotype$
- C
  $Acquired traits during an organism's lifetime are encoded in mitochondrial DNA, but not transmitted maternally$
- D
  $Acquired traits during an organism's lifetime affect only protein folding, so cannot persist beyond a single generation$
Why
$Modern biology: heritable changes must alter germline DNA. Most somatic changes are not inherited (with some epigenetic exceptions).$
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Sample 2difficulty 2/5
$Natural selection requires which of the following?$
- A
  $Variation, heritability, and differential reproductive success$
  check_circle
- B
  $Random mating, high mutation rate, and equal reproductive success$
- C
  $Genetic drift, isolation, and constant absolute fitness over time$
- D
  $Frequent migration, recombination, and a perfectly stable environment$
Why
$Darwin's three conditions: variation among individuals, heritable traits, and differential survival/reproduction.$
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