BIOL 1030 exam 1 study terms

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53 Terms

1

biodiversity

number of species, genera, etc

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2

classification

assigning organisms to a hierarchical group

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3

phylogeny

evolutionary history

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4

taxonomy (taxon, taxa)

naming of groups of organisms

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5

competing philosophies

cladistic v. evolutionary

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6

Evolutionary

taxa should share recent common ancestry and morphological similarities, may generate some paraphyletic taxa

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7

Cladistics

all taxa should be clades, monophyletic and holophyletic

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8

monophyletic

lineage with a single common ancestor

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9

holophyletic

a lineage including all descendants of a single common ancestor

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10

paraphyletic

a lineage including some but not all descendants of a single common ancestor (NOT a clade)

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11

polyphyletic

a lineage or trait found in independent lineages (NOT a clade)

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12

plesiomorphic

ancestral characteristic

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13

apomorphic

derived characteristic

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14

symplesiomorphic

shared, ancestral characteristic

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15

synapomorphic

shared, derived characteristic

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16

autapomorphic

unshared, derived characteristic

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17

homologous

similar based on shared common ancestry

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18

analogous

similar due to common function (not ancestry)

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19

homoplasy

analogous trait

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20

convergent evolution

evolution of analogous characteristics in distinctly related clades

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21

divergent evolution

evolution of homologous characteristics into new forms/phenotypes in the same clade

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22

dendrogram

a branching diagram that represents the relationships of similarity among a group of entities

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23

cladogram

diagrams which depict the relationships between different groups of clades

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24

phylogram

depict either the amount of evolution occurring in a particular gene sequence or the estimated duration of branches

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25

horotely

A normal or average rate of evolution per million years, of genera within a given taxonomic group

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26

tachytely

rapid evolution, or evolution that occurs faster than the average rate for a particular group of organisms. 

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27

bradytely

evolution that occurs at a very slow rate

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28

clade

a lineage of organisms that is derived from a single common ancestor and contains all descendants

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29

grade

a group of organisms that shares similarity but not by a shared common ancestor or excluding some descendants

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30

paralogs

ancestral gene duplicated and changed within a species, producing 2 different related genes

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31

orthologs

ancestral gene shared by 2 different species

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32

phyla in excavata

Diplomonadida, Kinetoplastida, Euglenophyta, Parabasala

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33

phyla in SAR

Bacillariophyta, Phaeophyta, Dinoflagellata, Apicomplexa, Ciliophora, Foraminifera, Radiolaria

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34

phyla in Archaeplastida

Rhodophyta, Chlorophyta (includes plants)

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35

phyla in Unikonta

Gymnamoeba, Myxogastrida, Choanoflagellata (includes animals and fungi)

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36

Diplomonadida

2 equal-sized nuclei

heterotrophic

free-living and parasitic

2, 4, or 8 flagella

lack mitochondria (secondarily)

most anaerobic

many live in gut of insects or vertebrates

Giardia lamblia -intestinal parasite of humans and other vertebrates

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37

Parabasala

parabasal body (large modified Golgi apparatus)

heterotrophic

axostyle

4 to 1000's of flagella

anaerobic

some with intra-cellular bacteria and surface attached spirochaetes

Trichomonas vaginalis -human urogenital tract

Trichonympha -termite gut

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38

Kinetoplastida

heterotrophs, mostly parasitic (part of Euglenozoa?)

kinetoplast (mass of DNA w/in single large mitochondrion)

trypanosomes, Trypanosoma brucei -African sleeping sickness, vector = tsetse fly

trailing flagellum attached to cell by undulating membrane.

Bodo saltans, free living kinetoplastid

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39

Euglenophyta

colorless heterotrophs and green photoautotrophs

longitudinal binary fission

Euglena and Peranema

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40

Euglena

2 flagella in flagellar reservoir

1 locomotory and 1 non-emergent or short

stigma

paraflagellar body

phototaxis

euglenoid (peristaltic) movement

chloroplast with 3 membranes

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41

Peranema

1 trailing and 1 leading flagellum (thickened by paraxial rod except at tip)

2 flagella

transverse flagellum in circumferential groove (cingulum)

longitudinal flagellum in longitudinal groove (sulcus)

theca -plates of cellulose in alveoli

palmella, bloom

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42

Bacillariophyta

diatoms

photosynthetic

marine, fresh water

cell wall & siliceous frustule, 2 valves

centric, pennate

asexual reproduction with decrease in size

gametic meiosis

diatomaceous earth

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43

Phaeophyta

brown algae

marine

photosynthetic macroalgae

kelp

holdfast, stipe, thallus, blade, meristem

algin

sporic meiosis

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44

Dinoflagellata

marine and freshwater dinoflagellates

most free-living, some endoparasites

many photosynthetic

chloroplasts of symbiotic origin

red, brown, or golden pigments

longitudinal fission

ex: Gymnodinium, Ceratium, Noctiluca, Symbiodinium

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45

Apicomplexa

sporozoans

apical complex

flagellated microgametes

pellicle = 3 membranes (large alveolus)

complex life cycles -haploid dominant

sporozoite

trophozoite

merozoite

gamonts (micro- and macrogametocytes)

micro- and macrogametes

oocyst

ex: Plasmodium -4 spp.

malaria causal agent

vector -Anopheles

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46

Ciliophora

freshwater, marine, soil

heterotrophic (some with endosymbiotic algae)

most free-living, some parasites

complex organelles, complex behavior

oral groove, cytostome, cytopharynx, food vacuole, cytoproct

contractile vacuole

cilia, cirrus (-i), membranelle

complex pellicle & alveoli, extrusomes

myoneme

Paramecium multimicronucleatum, Didinium, Vorticella, Euplotes, rumen ciliates

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47

Foraminifera

foraminiferans

mostly marine

benthic or planktonic

reticulopodia

calcareous, chambered test

mermaid's pennies, large fossil species

white cliffs of Dover

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48

Radiolaria

radiolarians and heliozoans

marine plankton, freshwater

delicate siliceous tests with apertures

axopodia

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49

Rhodophyta

red algae

marine

macroalgae

most in deep, cold water (red pigments)

carrageenan, agar

Porphyra tenera -nori

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50

Chlorophyta

green algae

photosynthetic, chlorophyll

motile and non-motile forms

large cup-shaped chloroplast

food storage as starch

many colonial species

Chlamydomonas, Volvox

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51

Gymnamoeba

naked amoebas, sarcodines

pseudopods (lobopodia)

marine, freshwater

most = benthic, some planktonic

Amoeba

many parasitic forms

Entamoeba hystolytica, E. gingivalis

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52

Myxogastrida

plasmodial slime molds

plasmodium -multinucleate mass of protoplasm

super cell

heterotrophic

complex life cycle (sporic meiosis), sclerotium

Physarum polycephalum -yellow slime mold

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53

Choanoflagellata

sister group of Metazoa

marine and freshwater

tiny cells <10 micrometers

solitary or colonial, sessile or motile

single flagellum within collar of microvilli

filter feeding

Proterospongia

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