Transcript Slide 1

SOME questions from January 20th
1- When on the test, are we expected to know the scientific names
of all plants/animals from lecture slides?
2- Are the gradualism and punctuated equilibrium model accepted
as counter-theories or coinciding theories?
3- When discussing evolution, the concept of a “common ancestor” is
often mentioned, if evolution has always been occurring, where did
the “common ancestor” come from or evolve from?
4- Are humans polymorhic? If so, could we evolve into separate
species overtime?
Evo-devo (interface between evolutionary biology and development)
Genes that control development play a major role in evolution.
Slight changes in the
relative rates of growth
during development can
change the adult form
substantially. Ex: skulls of
humans and chimpanzees.
Evolution of morphology
that arises by a modification
in allometric growth is an
example of heterochrony:
evolutionary change in the
rate or timing of
developmental events.
pages 478-479
Fig. 24.19
Paedomorphosis (“child” and “formation”) If the rate of reproductive
development accelerates compared to somatic development, the
sexually mature stage of a species may retain body features that
were juvenile structures in an ancestral species.
Fig. 24.21
7- Is evolution goal oriented?
Fig. 24.24
Chapter 26
Origin of Life
Life History
Chapter 28
Origins of Eukaryotic Diversity
The Origin of Life
1- Non-living synthesis of small organic molecules.
Primitive atmosphere
Lightning
2- Joining of these small molecules into
polymers.
Ancient sea
3- Origin of self-replicating molecules,
making inheritance possible.
Fig. 26.10
Fig. 26.11
includ. aminoacids
4- Packaging of all these molecules into “protobionts.
5- Natural selection could
refine protobionts containing
hereditary information.
Fig. 26.12
WHERE DID LIFE ORIGINATE?
1- Inorganic molecules in shallow
seas, moist sediments, seafloor,
deep-sea vents or volcanoes.
2-Organic molecules from meteorites
and comets.
Fig. 26.13
Fig. 7.4
Prokaryotes
How did eukaryotic
complexity evolve?
Fig. 28.3
Eukaryotes
The Origin of Eukaryotes
Fig. 28.4
Relationship
between the three
domains of life
Fig. 28.7
Diatom. Unicellular alga.
pages 546-548
Fig. 28.1
Examples of “Protists”
Plasmodial slime mold. Australian bull kelp. Multicellular alga: seaweed.
Amoeba. Unicellular eukaryote.
Figs. 26.2 to 26.7