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NEXT WEEK IN BIO153

! Tuesday: Lecture 18: Marine mammal evolution

! Thursday:Term Test II

! Friday: Tutorial 9

! Readings: Chapter 34

! Lab 9: Skull phylogeny

Session ID:l|c

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TUTORIAL 8A question regarding adaptation

Questions from Term Test ITerm Test II details

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THE PLATYHELMINTHES ARE THE ODD ONES OUT

A

P

C

C

C

C

P

C

C

C

A = Acoelomate

P = Pseudocoelomate

C = Coelomate

what is the advantage ofnot having a ceolom?

- flat with optimal

absorption-you don't need organs ifall you do is absorbnutrients from the surfaceof your skin-ceolem has organs-they're parasites, live inareas surrounded withliquid-all have access tonutrients though nutrients

in water-there is no defensemechanism, you are forcedto take up any toxins in thewater-limited by body size, all

your cells have to be acertain distance to absorbthose nutrients b/c cells at

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IN A COMPARISON OF BIRDS AND MAMMALS, HAVING HAIR IS

A" a shared ancestral character.

B" a shared derived character.

C" a character useful for distinguishing birds from mammals.

D" an example of analogy rather than homology.

E" a character useful for sorting bird species.

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YOU ARE CONFRONTED WITH A BOX OF PRESERVED GRASSHOPPERS

of various species that are new to science and have not beendescribed. Your assignment is to separate them into species.

There is no accompanying information as to where or when they

were collected. Which species concept will you have to use?

A" biological

B" phylogenetic

C" ecological

D" morphological

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SPECIES THAT ARE NOT CLOSELY RELATED

and that do not share many anatomical similarities can still beplaced together on the same phylogenetic tree by comparing their

A" plasmids.

B"mitochondrial genomes.

C" homologous genes that are poorly conserved.

D" homologous genes that are highly conserved.

what does highly conserved mean?-losing those genes would mean a severe disadvantage, has a lowmutation rate, meaning they don't change over an evolutionarytime-frame-poorly conserved: have high mutation rates, within one particulargene

-we want to look at genes that change very little-closely related species u may want to look at the poorly-conservedgenes (short-time frame suits those genes that mutate a lot)

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TERM TEST II LOGISTICS

! Mar. 17, during regular lecture time in CC1080

! Please attend the lecture section you are signed up for

! Read through instructions - first page from Term Test I is still

posted! Know your lab section and TAs name

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TERM TEST II FORMAT AND CONTENT

! 30 multiple choice questions and 1 short-answer question! Lectures 9 - 15

! Textbook:

! Chapter 27: Sections 1, 2, 4, 5, 6; Tables 27.1 and 27.2

! Chapter 28: Sections 1, 7; Figures 28.3, 28.17

! Chapter 29: all, excluding Figures 29.9 and 29.15

! Chapter 30: all, excluding Figures 30.5 and 30.13

! Chapter 31: Sections 1, 2 and 5; Figure 31.10

! Chapter 32: all

! Chapter 33: Figure 33.3 and Review table, plus info on where phyla

occur and how they live

vertebrates are not going to be on the TT

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CH. 27 MAIN POINTS

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CH. 27 MAIN POINTS

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CH. 30 MAIN POINTS

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CH. 33 MAIN POINTS

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CH. 33 MAIN POINTS

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AND IF YOU HAVE QUESTIONS BEFORE THE EXAM

! O!ce hours: Tue, 14:00-16:00pm, DV3008

! Course website discussion board

! Online Q&A: Wed, Mar. 16, 16:00 - 17:00

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NEXT LECTURE PERIOD

Lecture 18:Marine mammalevolution