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Flashcards in Evolution Deck (21):
1

Lamarckian Evolution

Use/Disuse
Theory of acquired traits

2

Darwinian Evolution

Natural Selection
Heritable variation with differential reproductive success

3

What are factors that can lead to speciation?

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

4

Demes

Small, local populations

5

Convergent evolution

Different ancestor, similar trait

6

Parallel evolution

More recent ancestor, similar trait
-e.g. marsupials and placental mammals

7

Divergent evolution

Recent ancestor, different trait

8

Adaptive radiation

Ancestor evolves into multiple lineages for niche specialization

9

What causes microevolution (deviations from HWE)?

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

10

What are types of fossils?

-Amber, molds, casts, petrification, imprints

11

Trilobites

Ancient arthropod of Paleozoic Era

12

Earlier stage embryonic development differs...

more dissimilar the adult organism will be.

13

Vestigial structures

no known current function but apparently had some ancestral function.

14

Heterotroph hypothesis

-1st forms of life depended upon outside sources for food
-Primordial soup contained sugars, aa, purines, pyrimidines

15

Primitive seas contained...

Salts, methane, ammonia, hydrogen, water

16

Energy in early primitive seas supplied by

heat, electricity, solar radiation, cosmic rays, radioactivity

17

Miller's experiment synthesized

urea, hydrogen, cyanide, acetic/lactic acid

18

Primitive cells

colloidal protein molecules clumped to form coacervate droplets absorbing substances

19

Autotrophs developed because...

organisms required nutrients faster than being synthesized.

20

Aerobic respiration developed because

-environment became oxidizing instead of reducing
-some oxygen was converted to ozone

21

Chemosynthetic bacteria are

anaerobic autotrophs