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Biology > 124-Lab Midterm > Flashcards

124-Lab Midterm Flashcards

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1
Q

an ancestral species and all of its descendants

A

clade

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2
Q

occurs at each branch point in a phylogenic tree

A

divergence

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3
Q

a scientific approach in which organisms are classified based on ancestral and derived characteristics

A

cladistics

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4
Q

describes two structures that look the same but do not have a common evolutionary origin

A

analogous

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5
Q

describes two different species that share a common ancestor

A

sister

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6
Q

a scientific approach in which organisms are classified according to their evolutionary relationships

A

systematics

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7
Q

a type of classification that does not necessarily involve evolutionary relationships

A

taxonomy

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8
Q

the opposite of “ancestral” for a systematist

A

derived

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9
Q

when one or more nucleotides added with a DNA region

A

insertion

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10
Q

describes two structures that have a common evolutionary origin but may look different

A

homologous

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11
Q

used to decide between a simple explanation and a complex explanation

A

parsimony

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12
Q

Caminacules

A

imaginary organisms devised by taxonomist Joseph Camin

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13
Q

Caminacule Characteristics

A
  • Eyes
  • Black bars
  • Elbows
  • Claws
  • Front legs
  • Spots
  • Hind legs
  • Tentacles
  • Rump bulge
  • Partially pared hind legs
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14
Q

What real world conditions might result in the rapid diversification of some lineages in a phylogenic tree?

A
  • Climate
  • Food
  • Defence
  • Aquatic to Land
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15
Q

Some lineages changed very little over time on the phylogenic tree, describe a real world scenario that might lead to little change over time

A

little to no change or disturbance in climate or environment, requiring no need to evolve or adapt.

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16
Q

Describe a real world scenario that might increase or decrease the probability of a species going extinct

A
  • environmental changes
  • climate changes
  • increase in population of predators
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17
Q

Find a example of convergent evolution among the Caminalcules

A

eyes

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18
Q

Convergent Evolution

A

cases where two or more species have a similar characteristic that evolved independently in each lineage

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19
Q

The wings of bats, birds, and bees

A

is an example of convergent evolution since the 3 groups did not inherit the characteristic from their common ancestor

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20
Q

Geological History that influences Diversity on Mt. Doug

A
  • The rock is metamorphic, originating as lava released on the seabed of the Pacific ~350mya.
  • The tectonic plate called Wrangellia collided with North America ~60mya, causing uplifting of the plate above sea level and the formation on mountains
  • The mountains were glaciated ~20tya during the last ice age- plants and animals were obliterated.
  • The glaciers left bare rock in higher areas, and sand & gravel was deposited in some lower areas
  • Recolonization of glaciated areas occurred from unglaciated (refugia) regions- perhaps as nearby as Sooke.
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21
Q

What are the main habitat zones of Mt. Doug park?

A
  • Coastal
  • Lower Forest
  • Upper Forest
  • Garry Oak/Open rock
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22
Q

Disturbance

A 
any relatively discrete event that disrupts ecosystems.
Examples:
-volcanic eruptions
-fires
-floods
-storms
-a tree falling
-logging
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23
Q

Ecosystem

A

the community of organisms in an area plus the abiotic factors that affect the community.

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24
Q

Edge Effect

A

the negative effect of a habitat edge on the interior conditions of a habitat. Edge effect is associated with habitat fragmentation

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25
Q

Exotic Species

A

species not normally found in a community but introduced from elsewhere

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26
Q

Fragmentation

A

dividing up of a continuous habitat into smaller patches. Habitat loss, roads, trails, dams, etc. cause fragmentation

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27
Q

Invasive Species

A

introduced species that increase in abundance at the expense of native species

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28
Q

Keystone Species

A

a species whose impact on its community is large, much larger that would be expected from its abundance

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29
Q

Peak Flows

A

Maximum flow of water in a river, stream, or creek. Most erosion happens during peak flows.

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30
Q

Succession

A

Changes in species composition through ecological time as a result of disturbance

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31
Q

Garry Oak/Open Rock Habitat

A
  • Dry, exposed rocky bluffs intermingled with Garry Oak, meadow grasses, lichens, licorice ferns, and mosses.
  • exotic and invasive Scotch Broom
  • Northern Alligator Lizard (Elgaria coerulea)
  • Garter snakes (Thamnophis ssp.)
  • Hummingbirds
  • Hawks, Turkey vultures, and Bald eagles often circle the summit.
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32
Q

Upper Forest Habitat

A
  • dominated by Douglas Fir, Western Red Cedar, Big leaf Maple, and occasional Garry Oak.
  • Shrubs and undergrowth of Oregon Grape, Ocean Spray, Snowberry, and roses, support a large songbird community
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33
Q

Lower Forrest Habitat

A
  • Douglas fir and Western Red Cedar
  • also find Grand fir, Pacific Dogwood, Big Leaf maple, Vine Maple, and Yew.
  • Invasive ivy and holly
  • Undergrowth: Salal or Western Sword fern
  • Swampy areas: Skunk cabbage, Northern Pacific Treefrog (Pseudacris regilla)
  • Terrestrial amphibians: Western Red-backed salamander (Plethodon vehiculum) and the Rough-skinned newt (Taricha granulosa)
  • Owls and woodpeckers common
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34
Q

Coastal Habitat

A
  • Upper canopy: Red Alder, Douglas fir, Western red cedar, Hemlock, Big leaf maple and a variety of shrubs.
  • Seabirds and marine life
  • At low tide: sea stars, mussels, chitons, green and brown algae, and other marine life.
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35
Q

Scotch broom

A

Cytisus scoparius

  • introduced
  • exotic and invasive
  • Garry Oak/Open Rock Habitat
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36
Q

Polypore fungus

A

Grifolia frondosa

  • “hen of the woods”
  • lower forest habitat
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37
Q

Snowberry

A

Symphoricarpus albus

  • native
  • upper forest habitat
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38
Q

English Ivy

A

Hedera helix

  • introduced
  • invasive
  • lower forest habitat
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39
Q

Bald hip rose

A

Rosa gymnocarpa

  • native
  • upper forest habitat
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40
Q

Western red cedar

A

Thuja plicata

  • native
  • lower forest and costal upper canopy habitat
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41
Q

Western sword fern

A

Polystichum munitum

  • native
  • lower forest habitat
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42
Q

Oregon grape

A

Mahonia nervosa

  • native
  • upper forest habitat
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43
Q

Big leaf maple

A

Acer macrophyllum

  • native
  • upper forest, lower forest and upper canopy of costal habitat
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44
Q

Grand fir

A

Abies grandis

  • native
  • lower forest habitat
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45
Q

Thimble berry

A

Rubus parviflorus

  • native
  • lower forest habitat
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46
Q

Western Yew

A

Taxus brevifolia

  • native
  • lower forest habitat
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47
Q

Salal

A

Gaultheria shallon

  • native
  • lower forest habitat
48
Q

Douglas fir

A

Pseudotsuga meziesii

  • native
  • lower habitat, and also upper forest and upper canopy of coastal habitat
49
Q

Bracken fern

A

Pteridium aquilinum

  • native
  • lower forest
50
Q

Red huckleberry

A

Vaccinium parvifolium

  • native
  • upper forest
51
Q

Licorice fern

A

Polypodium glycorrhizae

  • native
  • garry oak/open rock habitat
52
Q

European searocket

A

Cakile maritime

  • introduced
  • coastal habitat
53
Q

Arbutus

A

Arbutus meziesii

  • native
  • upper forest habitat
54
Q

Pileated woodpecker

A

Dryocupus pileatus

-keystone species

55
Q

The scientific name of 3 species found on Mt. Doug

A

Grand Fir = Abies grandis

Salal = Gaultheria shallon

English Ivy = Hedera helix

56
Q

List 3 procedures that accompany the safe handling of laboratory bacteria

A
  • wear a lab coat
  • no eating or drinking in the lab
  • wash hand with antibacterial skin cleanser before leaving the lab
57
Q

Inoculating loops

A

aka smear loop
- is a simple tool used mainly by microbiologists to retrieve an inoculum from a culture of microorganisms. The loop is used in the cultivation of microbes on plates by transferring inoculum for streaking

58
Q

Petri dish

A

a shallow, circular, transparent dish with a flat lid, used for the culture of microorganisms

59
Q

Kimwipe

A

delicate task wipers are specifically designed to gently clean liquid and dust and are great for instrumentation, surface, parts and lens cleaning. They have been designed to reduce lint and have low extractables

60
Q

Aseptic technique

A

is a method designed to prevent contamination from microorganisms. It involves applying the strictest rules and utilizing what is known about infection prevention to minimize the risks that you’ll experience an infection

61
Q

Explain how to carry out a Sensitivity test

A

Sensitivity disks- are disks of filtered paper containing a measured quantity of an antibiotic. If they are placed on the surface of an agar plate that has been previously inoculated with bacteria, the antibiotic will diffuse into the agar. In this simple way, various antibiotics can be tested for their effectiveness, even if the identity of the bacteria in question is unknown.

62
Q

Extreme Halophile

A

are organisms that thrive in high salt concentrations. They are a type of extremophile organism. Halophiles can be found anywhere with a concentration of salt five times greater than the salt concentration of the ocean, such as the Great Salt Lake in Utah, Owens Lake in California, the Dead Sea, and in evaporation ponds.

63
Q

Thioglycollate agar

A

is a multipurpose, enriched, differential medium used primarily to determine the oxygen requirements of microorganisms in tubes.

64
Q

Heterocysts

A
  • a large, transparent, thick-walled cell found in the filaments of certain blue-green algae and in certain fungi.
  • are involved in nitrogen fixation and storage
65
Q

Bacterial lawn

A

a term used by microbiologists to describe the appearance of bacterial colonies when all the individual colonies on a petri-dish agar plate merge to form a field or mat of bacteria

66
Q

Locations of bacterial growth in Thioglycolate agar tube

A
  • Aerobic = grows on surface of agar
  • Anaerobic = grows on the bottom of agar
  • Facultative = Grows throughout agar, heavier growth at surface
67
Q

Interpret the results of a Thioglycolate test

A

AKA Locations of bacterial growth in Thioglycolate agar tube:

  • Aerobic = grows on surface of agar
  • Anaerobic = grows on the bottom of agar
  • Facultative = Grows throughout agar, heavier growth at surface
68
Q

What is the difference between Gram+ and Gram- bacteria: how and why do they often differ in their response to common antibiotics

A

due to their different cell wall structure and chemistry. Gram- has higher lipid content. Gram+ has increased peptidoglycan.

69
Q

What is the difference between Gram+ and Gram- bacteria: how and why do they often differ in their response to common antibiotics

A

-due to their different cell wall structure and chemistry. The distinctive feature of Gram- bacteria is the presence of a double membrane surrounding each bacterial cell. Although all bacteria have an inner cell membrane, Gram- bacteria have a unique outer membrane. This outer membrane excludes certain drugs and antibiotics from penetrating the cell, partially accounting for why Gram- bacteria are generally more resistant to antibiotics than are gram-positive bacteria.

70
Q

After gram staining, Gram- bacteria appear

A

pink

71
Q

Sensitivity test

A
  • controlling bacterial growth
  • some bacteria and fungi produce chemicals called antibiotics that inhibit the growth of other bacteria or fungi. Many plant derived and synthetic chemicals also inhibit or slow bacterial growth
  • You can test effectiveness of these chemicals using swabbed plates of bacteria and sensitivity disks impregnated with an antibiotic.
72
Q

Interpret a set of results of an Antibiotic Sensitivity test: Erythromycin

A

Erythromycin

  • Resistant <14
  • Intermediate 14-17
  • Sensitive >17

(also used to compare household items)

73
Q

Interpret a set of results of an Antibiotic Sensitivity test: Penicillin-G

A

Penicillin-G

  • Resistant <21
  • Intermediate 21-28
  • Sensitive >28
74
Q

Interpret a set of results of an Antibiotic Sensitivity test: Tetracycline

A

Tetracycline

  • Resistant <15
  • Intermediate 15-18
  • Sensitive >18
75
Q

Interpret a set of results of an Antibiotic Sensitivity test: Novobiocin

A

Novobiocin

  • Resistant <18
  • Intermediate 18-21
  • Sensitive >21
76
Q

Shapes of Bacteria

A

Rod = Bacilli
Spherical = Cocci
Spiral Rod = Spirilla

77
Q

Arrangement of Bacilli

A 
Single = Bacillus
Pairs = Diplobacilli
Chains = Streptobacilli
78
Q

Arrangement of Cocci

A 
Single = Coccus
Pair = Diplococci
Chains = Streptococci
Irregular = Staphylococci
79
Q

String test

A
  • Designed to confirm the Gram reaction of a bacterial culture.
  • When Gram- bacterial cells are added to 3% Potassium Hydroxide (KOH), the cell wall breaks down, releasing DNA into the KOH. The released DNA forms strings behind a loop as it is lifted from a slide= a + string test. In Gram+ bacteria, the cell wall fails to break down in the KOH, resulting in a negative string test (DNA not released)
80
Q

If the bacterium is stained purple with gram stain, it is said to be Gram _____, and shows a ______ string test.

A

Gram+

negative string test

81
Q

If the bacterium is stained pink with gram stain, it is said to be Gram _____, and shows a ______ string test.

A

Gram-

positive string test

82
Q

Bacterial Dichotomous Key

A

-Consists of pairs of numbered contrasting statements. Read both statements, and the decide which is truer for your specimen. At the end of each pair of statements you will find either the name of your organism or a number referring to the next pair of statements to compare.

83
Q

Blue-green algae are AKA by the more specific name

A

Cyanobacteria

84
Q

Why do blue-green algae vary in colour

A

Besides the dark green Chlorophyll a, cyanobacteria possess a number of accessory pigments, including the blue Phycocyanin. The relative amount of each pigment determines the overall colour of a given organism. Thus some of them appear to be black, purple, red, or various shades of green.

85
Q

Cyanobacteria

A
  • specialized bacteria that use Chlorophyll a (dark green) in photosynthesis and release oxygen as a result.
  • reproduce by binary fission
86
Q

Nitrogen fixation

A

Some cyanobacteria convert atmospheric nitrogen (N2) to ammonia (NH3). In this form, nitrogen can be incorporated into organic molecules by bacteria and plants.
-heterocysts are involved in nitrogen fixation and storage

87
Q

Describe the structure of Oscillatoria

A
  • the cells of this cyanobacterium occur in filamentous chains.
  • after cell division the cells adhere and since all divisions are in the same plane, a filament results
  • the filaments don’t grow to great lengths because separation disks form at varying intervals. At these points a cell dies and collapses slightly inward leaving a weak spot where the filament will eventually break.
  • use gliding motion due to a thin sheath composed of a gelatinous material that covers individual filaments.
88
Q

What cellular structures are lacking in the movement of blue-green algae? How do they move?

A

1) Lack Flagella

2) Gliding mobility

89
Q

What feature distinguishes Nostoc from many other blue-green algae?

A

Under certain environmental conditions it can form large spherical masses (“sack/ball”) containing thousands of individual colonies embedded in a gelatinous matrix

90
Q

The function of akinetes in Gleotrichia is to

A

-are think-walled dormant spores considerably larger and darker than the ordinary cells that make up the trichomes. They are resistant to adverse environmental conditions and may be viable for 70-80yrs. When conditions are favorable, they germinate to form a vegetative trichome.

91
Q

What ecological roles to cyanobacteria share with plants and algae

A

producer = photosynthetic

92
Q

How do the cells of cyanobacteria differ from plant cells

A

1-Cell wall is peptidoglycan, not cellulous

2-No organelles

93
Q

List the 5 parakingdoms/kingdoms that are included within Domain Eukarya

A
  • Excavata
  • Chromalveolates
  • Rhizarians
  • Archaeplastida
  • Unikonta
94
Q

Giardia

A
  • 3 structures: Multiple Flagella, Hapliod nuclei (2), and Median body
  • causes “beaver-fever” = intestinal disease that affects many different vertebrates species, inlc. humans.
  • reproduce by binary fission and must be attached to a surface for this to occur.
  • parasite = gets their food from the body of other organisms (host)
95
Q

Trypanosoma

A
  • surrounded by blood cells
  • 3 structures: free and attached flagella, nucleus, and undulating membrane
  • parasite (vector: Tsetse fly) that causes African sleeping sickness.
  • generally found in the intestine of invertebrates, but normally occupy the bloodstream or an intracellular environment in the mammalian host.
  • parasite =gets their food from the body of other organisms (host)
96
Q

Euglena

A
  • mixotrophic = have photosynthesizing chloroplasts within the body of the cell, which enable them to feed by autotrophy, like plants.
  • are found in fresh and salt waters. They are often abundant in quiet inland waters where they may bloom in numbers sufficient to color the surface of ponds and ditches green or red.
  • 6 structures: flagellum, 2nd flagellum, eye spot, light detector, contractile vacuole, nucleus, chloroplasts, plasma membrane, paramylon granuole, protein bands
97
Q

Dinoflagellates

A
  • “algae” causing “red tide”
  • found in the ocean and fresh water
  • photosynthetic
  • 2 structures: cellulose plates, and flagella
98
Q

Paramecium

A
  • belongs to the Ciliates (a complex group of animal-like protists).
  • found in freshwater, brackish, and marine environments and are often very abundant in stagnant basins and ponds.
  • To gather food, the Paramecium uses its cilia to sweep prey organisms, along with some water, through the oral groove, and into the mouth opening.
  • 5 structures: cilia, food vacuole, oral groove, micronucleus, macronucleus, and anterior/posterior contractile vacuole.
99
Q

Diatoms

A
  • found in marine and fresh water
  • phytoplankton community
  • photosynthetic
  • name the 6 organisms:
100
Q

Brown Algae

A
  • Bull Kelp, and Rockweed
  • Marine
  • Autotrophs
  • 4 structures: lamina, air bladder, stipe, and holdfast
101
Q

Slime molds are more closely related to ______ than they are Fungi

A

amoebas

102
Q

The cell walls of slime molds are composed of ______, while the cell walls of Fungi is composed of ______.

A

Slime molds = cellulose

Fungi = chitin

103
Q

Slime molds store carbohydrate in the form of

A

glycogen

104
Q

The vegetative state of a slime mold that is like a mass of cytoplasm containing many small nuclei is termed a

A

plasmodium

105
Q

The plasmodium contains many nuclei in one cell and is termed

A

coenocytic

106
Q

Amoebas

A
  • “glove”
  • 4 structures: nucleus, sol, gel, contractile vacuole, food vacuoles, and pseudopods.
  • aquatic
  • heterotroph
107
Q

The cell walls of red algae are composed of

A

cellulose

108
Q

Cell walls containing calcium carbonate are present in ______ red algae

A

coralline red algae

109
Q

______, which is used in making bacterial growth media, comes from red algae

A

Agar

110
Q

______ from certain red algae is used widely in the food industry - from ice cream to beer.

A

carrageenin

111
Q

How are pigments of green algae similar to those of Kingdom Plantae

A

chlorophyll a and b

112
Q

4 growth forms of green algae and name an example of each

A
  • filamentous = spirogyra
  • colonial = volvox
  • multicellular = uvla
  • unicellular = chlamydomonas
113
Q

Pyrenoid

A

-produces and stores starch

114
Q

Spirogyra

A
  • green algae
  • photosynthetic
  • found in freshwater
  • 4 structures: spiral chloroplast, pyrenoid, nucleus, and cytoplasmic strand.
115
Q

Ulva

A
  • “sea lettuce”
  • multicellular, and has leaf-like appearance, but is only 2 cell layers thick. -soft and translucent green.
  • grows on rocks and on other algae in shallow coastal waters, attaching by a small holdfast
  • photosynthetic green algae
116
Q

Name 2 groups of organisms that can carry out nitrogen fixation

A
  • Nostoc
  • Gleotrichia
  • Anabaena azollac

Biology (12 decks)

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