Variation and evolution: แบบฝึกหัด

• a.

  Eye colour in humans

• b.

  A scar on the skin from an injury

• c.

  Naturally occurring blood group

• d.

  The presence of a genetic disorder like Polydactyly

• a.The age of the organism, its gender, and its habitat.
• b.The type of cell division, the number of ribosomes, and the rate of respiration.
• c.Predation, competition, and the availability of food.
• d.Genetic causes, environmental causes, or a combination of both.

• a.

  Darwin failed to publish his ideas in a formal book for over 50 years.

• b.

  The fossil record at the time showed that organisms never changed over millions of years.

• c.

  Lamarck's theory of inheritance of acquired characteristics had already been proven correct.

• d.

  The mechanism of inheritance and variation was not known at the time the theory was published.

• a.

  The formation of new species within a single generation.

• b.

  Inbreeding, which makes the population prone to disease or inherited defects.

• c.

  The accidental creation of genetically modified (GM) organisms.

• d.

  Increased genetic variation within the species.

• a.

  To provide the amino acid sequence required for protein synthesis.

• b.

  To insert the isolated gene into the required cells of the target organism.

• c.

  To act as an enzyme that cuts the required gene out of a chromosome.

• d.

  To stimulate an electric shock that triggers cell division in the embryo.

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