Practical #1 Exam: Systematics Flashcards

1
Q

Systematics

A
  • 3 domains
  • 6 kingdoms
  • 28 phyla
  • used to follow evolutionary trends to add understanding and memorization
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2
Q

Monophyletic Group

A
  • all members trace back to a recent common ancestor
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3
Q

Polyphyletic Group

A
  • members do not trace back to their
    most recent common ancestor
  • more work is needed to refine evolutionary
    relationships
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4
Q

Homologous

A
  • similarity derived from common ancestry
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5
Q

Analogous

A
  • artificial similarity not
    based on common ancestry
  • the independent origin of similar trait
    from a dissimilar ancestral condition.
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6
Q

Ex. of Analogous

A

-same function but different evolutionary lineage.
- have different functions.
- evolutionary lineage.
- different evolutionary lineage.

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7
Q

What is the goal of phylogenic trees?

A
  • to have lineage trace back to common ancestor without including unrelated species
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8
Q

What information should you use to determine if something is homologous or analogous?

A
  • kingdom designation
  • x-ray
  • ratio of appendage to torso
  • outer covering composition
  • ribosomal sequences
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