Bio 1500 Final Exam 270 questions with 100% verified answers
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Bio 1500
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Bio 1500
Bio 1500 Final Exam 270 questions with 100% verified answers/Bio 1500 Final Exam 270 questions with 100% verified answers/Bio 1500 Final Exam 270 questions with 100% verified answers
Bio 1500 Final Exam
What type of predators are dragonflies? - correct answer - Aerial: grab flying insects with legs
mid air
- Aquatic: use labium (mask) to grab prey (fish)
When do the first dragonfly fossils date back to? - correct answer 325 MYA
What was a unique ability of dragonflies at the time? - correct answer among first insects to
fly; primitive (early stage) wing morphology
Meganura - correct answer - big dragonflies of Carboniferous period
- 3 ft wingspan
Describe the life stages of dragonflies - correct answer - eggs laid in water
- larvae hatch within 2-5 weeks
- larvae = aquatic for 3+ years
- once developed into adult, they leave water and live on land as adults
What is the outstanding characteristic of animals (including dragonflies) in the Carboniferous
period? - correct answer Huge body size
What are 3 hypothesis for why dragonflies were so big? - correct answer o higher oxygen
concentration in atmosphere during Carboniferous
o higher carbon dioxide levels
o higher temperature
Evaluate these hypotheses based on your explorations in EarthViewer - correct answer At the
beginning of the Carboniferous period, oxygen levels were high, carbon dioxide levels were
high, and Earth's temperature was high. During Carboniferous, these all lowered over the time
period.
What is the most important and least important attribute for employers and medical schools? -
correct answer o Most important: team-working skills
o Least important: content knowledge
What are the dates of the formation of the universe, earth, and moon? - correct answer o 13.7
BYA universe formation
o 4.6 BYA Earth formation
o 4.5 BYA moon formation
,Bio 1500 Final Exam
What are the dates of the oldest signs of life, types of bacteria, and ice age? - correct answer o
3.5-3.8 BYA oldest signs of life
o 2500-1200 MYA types of bacteria forming
o 750-600 MYA ice age
What are the dates of the first animals, dinosaurs, and humans? - correct answer o 590 MYA
first animals
o 230-65 MYA dinosaurs
o 200,000 YA humans
When was the Carboniferous period? How does this relate to other major events? - correct
answer 360-300 MYA; after animals, but before dinoaurs
What are some environmental characteristics of the Carboniferous time? - correct answer -
similar climate to today
- larger animals
- Plants functioning as forests
general pattern in the distribution of major events in the history of life - correct answer life
development occurred within a very short amount of time compared to other major events
Relate the changes of O2 levels in the atmosphere to biological events in the history of life -
correct answer - no dioxygen in the atmosphere 3.5-2.8 BYA
- cyanobacteria formed 2.5 BYA -> initial rise in dioxygen to 3% - Because of unoxidized
elements and minerals on Earth, oxygen levels remained at 3% until 800 MYA
- 800 MYA these materials finished oxidizing, allowing oxygen levels to rise to 20%
Where does all O2 on earth stem from? - correct answer biological processes (photosynthesis)
What has dramatically changed the geology of earth? - correct answer biology
mechanism of diffusion at the level of single particles - correct answer - bounce randomly off
one another
- unpredictable
pattern due to diffusion at the level of many particles - correct answer - movement from high
to low concentration
- If there are many particles in one area, they will distribute themselves evenly in all areas.
- predictable movement
, Bio 1500 Final Exam
• Explain the relationship between distance and time during diffusion - correct answer T = x^2
/ 2D (T = time, x = distance, D = diffusion coefficient)
***small distance increase -> large time increase
What is the limitation to organisms of using diffusion for transport of molecules? - correct
answer The limitation for diffusion is distance. Diffusion takes much longer & is not effective
over long distances.
Bar graph - correct answer best used for categorial data
Scatterplot - correct answer independent variable is quantitative; summarizes an overall
pattern or trend
Line graph - correct answer independent variable is quantitative; categories of variable can be
arranged in a natural sequence (months, increasing doses of medication, etc.)
what are the situations in which a logarithmic axis is preferable to a linear axis? - correct
answer - If one or a few values are much larger or smaller than the rest of the data
- If you want to show percentage change
Error bars - correct answer - convey the level of uncertainty in the data
- convey the variation among measurements used to calculate that mean
hypothesis about factors that allowed insects to be so big, based on the findings of Clapham
and Karr - correct answer oxygen concentration in the atmosphere contributed to large size of
insects during the first part of the Carboniferous period. The decoupling of oxygen
concentration and wing length in dragonflies may have been caused by the evolution of birds,
which caused predation pressure.
what wavelengths (i.e. colors) of light are absorbed by chlorophyll? - correct answer blue,
violet, and red (green is reflected, so we see green plants)
Light dependent reactions - correct answer input sunlight and water, synthesize ATP from ADP
(energy is put into bond), generate NADPH, and output oxygen
Light independent reactions - correct answer input carbon dioxide and water and the energy
from ATP (making it ADP again) and NADPH is used to synthesize glucose from the carbon
dioxide and water
Explain why O2 is a by-product of photosynthesis - correct answer O2 is a byproduct of
photosynthesis because of the splitting of H2O. The hydrogens are used as protons in ATP and
NADPH, and oxygen is released as a byproduct
What is the main transport form and immediate source of energy in cells? - correct answer ATP
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