Bio 370 Exam 2 Question and answers
correctly solved 2025/2026
How would an endotherm react to a rise in temp? - correct answer ✔Body temp remains constant
major challenge for gas exchange for terrestrial vertebrate - correct answer ✔significant water loss
Gases need to be dissolved at the respiratory surface in order to diffuse into body fluids
which is More developed in aquatic animals than terrestrial animals? - correct answer ✔lateral line
system for electroreception
the world today - correct answer ✔continent separation
land in temperate regions (northern hemi)
temp cold and dry
Cold climate with permanent ice
Permian Period - correct answer ✔woody plants co2 resistant, swampy coal beds, higher O2 decrease
CO2, giant flying arthropods, tetrapods, increase herbivory
Paleozoic Pangaea - correct answer ✔335-160 mil yrs ago
large areas close to equator
plants and animals
Silurian Period - correct answer ✔simple terrestrial ecosystem
small plants: moss and fungi
First terrestrial Arthropods 435mya
,scorpion, millipede
vascular plants in devonian - correct answer ✔roots: gather water and nutrients
leaves: photosynthesis
vascular sys:fluid transport
cuticle:prevent drying
Support: lingin and cellulose
Devonian (410mya) - correct answer ✔No terrestrial vertebrates!
no flying insects or plant eaters
Mostly Detritivores and Carnivores
ex: millipedes, springtails, scorpion, spiders
Early Carboniferous (mississipian, pennsyvanian) - correct answer ✔First Terrestrial Vertebrates!
Giant horsetails and ferns, vines no flowering plants or grasses
first flying insects!
global environmental factors that affect evolution - correct answer ✔Temp
CO2
O2
Why does temp vary? - correct answer ✔Milankovich cycles
solar radiation
greenhouse gases
location of continents
, CO2
5 major extinctions - correct answer ✔Ordovician, Devonian, Permian, (paleozoic extinctions) then
Triassic, Cretaceous
Ordovician-Silurian Extinction - correct answer ✔Caused by a drop in sea levels as glaciers formed
movemnet of Gondwana to south pole
drop in CO2
60% of marine invertebrates died
Devonian Extinction - correct answer ✔likely because: ocean volcanism
ocean anoxia, frop in sea levels
evolution of large vascular land plants
Permian-Triassic Extinction - correct answer ✔largest in history,
95% of marine, 70%of terrestrial, 49% tetrapods, 57% marine invertebrates
Cause of Permian Extinction - correct answer ✔multiple stressors:
Siberian traps, release of methane, pangea formation, ocean anoxia, hydrogen sulfide release, sea level
fluctuations, Meteor?
Transition to land obstacles - correct answer ✔- No buoyancy
- Scarce water
- Extreme temperatures
- Excess light including UV
correctly solved 2025/2026
How would an endotherm react to a rise in temp? - correct answer ✔Body temp remains constant
major challenge for gas exchange for terrestrial vertebrate - correct answer ✔significant water loss
Gases need to be dissolved at the respiratory surface in order to diffuse into body fluids
which is More developed in aquatic animals than terrestrial animals? - correct answer ✔lateral line
system for electroreception
the world today - correct answer ✔continent separation
land in temperate regions (northern hemi)
temp cold and dry
Cold climate with permanent ice
Permian Period - correct answer ✔woody plants co2 resistant, swampy coal beds, higher O2 decrease
CO2, giant flying arthropods, tetrapods, increase herbivory
Paleozoic Pangaea - correct answer ✔335-160 mil yrs ago
large areas close to equator
plants and animals
Silurian Period - correct answer ✔simple terrestrial ecosystem
small plants: moss and fungi
First terrestrial Arthropods 435mya
,scorpion, millipede
vascular plants in devonian - correct answer ✔roots: gather water and nutrients
leaves: photosynthesis
vascular sys:fluid transport
cuticle:prevent drying
Support: lingin and cellulose
Devonian (410mya) - correct answer ✔No terrestrial vertebrates!
no flying insects or plant eaters
Mostly Detritivores and Carnivores
ex: millipedes, springtails, scorpion, spiders
Early Carboniferous (mississipian, pennsyvanian) - correct answer ✔First Terrestrial Vertebrates!
Giant horsetails and ferns, vines no flowering plants or grasses
first flying insects!
global environmental factors that affect evolution - correct answer ✔Temp
CO2
O2
Why does temp vary? - correct answer ✔Milankovich cycles
solar radiation
greenhouse gases
location of continents
, CO2
5 major extinctions - correct answer ✔Ordovician, Devonian, Permian, (paleozoic extinctions) then
Triassic, Cretaceous
Ordovician-Silurian Extinction - correct answer ✔Caused by a drop in sea levels as glaciers formed
movemnet of Gondwana to south pole
drop in CO2
60% of marine invertebrates died
Devonian Extinction - correct answer ✔likely because: ocean volcanism
ocean anoxia, frop in sea levels
evolution of large vascular land plants
Permian-Triassic Extinction - correct answer ✔largest in history,
95% of marine, 70%of terrestrial, 49% tetrapods, 57% marine invertebrates
Cause of Permian Extinction - correct answer ✔multiple stressors:
Siberian traps, release of methane, pangea formation, ocean anoxia, hydrogen sulfide release, sea level
fluctuations, Meteor?
Transition to land obstacles - correct answer ✔- No buoyancy
- Scarce water
- Extreme temperatures
- Excess light including UV
