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Flashcards in Evolution Deck (21)
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1
Q

Lamarckian Evolution

A

Use/Disuse

Theory of acquired traits

2
Q

Darwinian Evolution

A

Natural Selection

Heritable variation with differential reproductive success

3
Q

What are factors that can lead to speciation?

A

Genetic variation, change in env, migration and adaptation to new env, natural selection, isolation, genetic drift

4
Q

Demes

A

Small, local populations

5
Q

Convergent evolution

A

Different ancestor, similar trait

6
Q

Parallel evolution

A

More recent ancestor, similar trait

-e.g. marsupials and placental mammals

7
Q

Divergent evolution

A

Recent ancestor, different trait

8
Q

Adaptive radiation

A

Ancestor evolves into multiple lineages for niche specialization

9
Q

What causes microevolution (deviations from HWE)?

A

-Migration, non-random mating, natural selection, mutations, genetic drift

10
Q

What are types of fossils?

A

-Amber, molds, casts, petrification, imprints

11
Q

Trilobites

A

Ancient arthropod of Paleozoic Era

12
Q

Earlier stage embryonic development differs…

A

more dissimilar the adult organism will be.

13
Q

Vestigial structures

A

no known current function but apparently had some ancestral function.

14
Q

Heterotroph hypothesis

A
  • 1st forms of life depended upon outside sources for food

- Primordial soup contained sugars, aa, purines, pyrimidines

15
Q

Primitive seas contained…

A

Salts, methane, ammonia, hydrogen, water

16
Q

Energy in early primitive seas supplied by

A

heat, electricity, solar radiation, cosmic rays, radioactivity

17
Q

Miller’s experiment synthesized

A

urea, hydrogen, cyanide, acetic/lactic acid

18
Q

Primitive cells

A

colloidal protein molecules clumped to form coacervate droplets absorbing substances

19
Q

Autotrophs developed because…

A

organisms required nutrients faster than being synthesized.

20
Q

Aerobic respiration developed because

A
  • environment became oxidizing instead of reducing

- some oxygen was converted to ozone

21
Q

Chemosynthetic bacteria are

A

anaerobic autotrophs