Transcript SI Bio 211 Thursday, November 19, 2008

SI Bio 211
Thursday, November 20, 2008
Jenny F.
What biome is this?
Tundra
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Cold
Short growing season
No trees
Permafrost
Ice-wedge polygons
Animal examples: polar bear, rabbits, oxen,
deer, etc.
What biome is this?
Tropical Rain Forest
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•Warm and wet year-round
•Home to 50% of the world’s species
•Evergreen
•Do have seasonality
What biome is this?
Chaparral
-Mediterranean vegetation
--warm, dry summers
-Cool, wet winters
-Often on hills near cool oceans
-Shrubby vegetation, evergreen or
deciduous
-Infrequent, devastating fires
-Many unique species
• Are biomes characterized by the plant or
animal life that inhabits them? Explain why
you chose the answer that you did.
What biome is this?
Savanna
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Defined by grass layer
Variable tree and shrub cover
Abundance of large grazing mammals
Strongly Seasonal
Fire
Migrating animals
What type of plant is this? And what
biome is it most common to? Is it
vascular or non-vascular?
• Moss
• Taiga
• Non-vascular
Compare abiotic and biotic factors and
give examples of each
• Which of the following is not an abiotic factor
that shapes ecosystems?
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A. soil minerals
• B. predators
• C. fire
• D. rainfall
• E. volcanic eruptions
• What are adaptations that plants and animals
may undergo if they live in desert
environments?
Differentiate between still waters,
moving waters, and wetlands
• •Still waters (ponds & lakes)
• •Moving waters (rivers & streams)
• •Wetlands fresh, salt, or brackish marshes
/swamps (trees)
Describe vertical stratification.
• Surface Euphotic Zone
- Plants (shallow waters)
- Plankton (open waters)
•Deeper Aphotic Zone
-Little light = cooler
-Detritus-based
•Benthos
-(the sediments)
Describe the Littoral Zone.
What is the littoral zone?
•Emergent plants
•Floating-leaved plants
•Submerged aquatic plants
Population densities of plankton are likely to be
greatest in which part of a lake?
A. photic zone
B. euphotic zone
C. thermocline
D. benthos
E. littoral zone
Population densities of plankton are likely to be
greatest in which part of a lake?
A. photic zone
B. euphotic zone
C. thermocline
D. benthos
E. littoral zone
• Which of the following organisms does not
reproduce cells by mitosis and cytokinesis?
A. banana tree
B. bacterium
C. cockroach
D. cow
E. mushroom
In what ways are all protists alike? They are all
A. nonparasitic
B. eukaryotic
C. multicellular
D. marine
E. photosynthetic
• Are fungi….
- prokaryotic or eukaryotic?
- Heterotrophic, autotrophic, or chemotrophic?
• Which of the following is the unit of
evolution? In other words, which of the
following can evolve in the Darwinian sense?
A. gene
B. chromosome
C. individual
D. population
E. species
Bacteria which live on your skin without causing
disease are described as having what kind of
symbiotic relationship with you?
a. commensalism
b. mutualism
c. parasitism
d. pathogenesis
e. heterotrophism
• Which of the following is a general trend in
the evolution of the plant kingdom?
a. small plants to large plants
b. increasing dominance of the gametophyte
stage
c. diminution of the gametophyte stage
d. increasing efficiency of photosynthesis
e. increasingly complex seeds
• Angiosperms are the most successful
terrestrial plants. This success is associated
with all of the following except
A. xylem with vessels.
B. sperm cells with flagella
C. animal pollination
D. reduced gametophytes
E. fruits enclosing seeds.
Fungi….
• How are the hyphae and mycelium related to
one another?
• What purpose does chitin have?
• How is nutrition acquired?
• What is the difference between saprobes and
parasites?
• What is mycorrhizae?
• Do they produce asexually or sexually?
How do fungi reproduce asexually?
• -via hyphae or mycelia
• -via haploid spores (produced by mitosis)
• -via budding (yeasts)
How do fungi produce sexually?
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Fusion of haploid hyphae
---Dikaryotic stage, sometimes
---diploid stage
1n spores produced by meiosis
Which fungi phylum….
• Has flagellated zoospores and is responsible
for amphibian decline?
• Includes the bread mold, rhizopus?
• Forms arbuscular mycorrhizae with plants?
• Consists of sac fungi?
• Includes what we think of as mushrooms?