BIO 1108 EXAM 2 2026 QUESTIONS
AND ANSWERS WITH COMPLETE
SOLUTIONS – UPDATED FOR YOUR
SUCCESS
What are the defining characteristics of a kelp forest ecosystem? ✔✔ Kelp forests
are recognized for being more biodiverse than most marine environments,
possessing high levels of ecological resistance and resilience, and thriving in
water rich in oxygen and nutrients.
Which type of molecule holds the highest amount of potential energy available for
biological work? ✔✔ The molecule with the greatest number of chemical
bonds typically contains the most harnessable potential energy.
Is it true that any organism exhibiting shivering and migratory behavior is strictly
classified as an endotherm? ✔✔ False.
What specific adaptations could a newly discovered bird species, such as the Ice
Goose, use to regulate its body temperature? ✔✔ To thermoregulate, this species
might use vasoconstriction or vasodilation, adjust its metabolic rate, pant,
migrate, grow insulating down feathers, or undergo molting.
Sometimes an animal has a structural adaptation (morphological) that is adapted
for a very specific function. Similar to the thick double-layer fur of a sea otter acts
to trap air and repel water as insulation in a cold marine environment.
Which of the following would be another morphological adaptation for cold
weather? -ANSWER ✔✔Small ears that limit the time blood vessels spend in
appendages
, Like most organisms, salmon have a fairly narrow range of acceptable osmolarities
(salinity) in their internal tissues. However, salmon are born in freshwater and then
spend years 2-5 in the ocean before returning to freshwater streams to reproduce.
This indicates that salmon are most likely ______________ -ANSWER
✔✔osmoregulators
When an urchin eats a piece of kelp, the energy found in the kelp is lost as heat
during which processes? [Select all that apply] -ANSWER ✔✔- As ATP generated
in cellular respiration is broken down, releasing energy that can be harnessed by
enzymes to function
- As the cellulose (complex carbohydrate) in the kelp is broken down into smaller
sugars using enzymes
- As the proteins and DNA in the kelp are disassembled in the urchin digestive
system
- As glucose is broken down through cellular respiration
Why is oxygen consumption a reasonable proxy (stand-in) for metabolic rate? -
ANSWER ✔✔Because cellular respiration usually consumes oxygen as it breaks
down glucose
Are all organisms in this food web equally as important? -ANSWER ✔✔no
What type of metabolism[s] does each type of plankton utilize?
(heterotroph, autotroph, or both)
1. Zooplankton
2. Phytoplankton -ANSWER ✔✔1. heterotrophs
2. autotrophs
AND ANSWERS WITH COMPLETE
SOLUTIONS – UPDATED FOR YOUR
SUCCESS
What are the defining characteristics of a kelp forest ecosystem? ✔✔ Kelp forests
are recognized for being more biodiverse than most marine environments,
possessing high levels of ecological resistance and resilience, and thriving in
water rich in oxygen and nutrients.
Which type of molecule holds the highest amount of potential energy available for
biological work? ✔✔ The molecule with the greatest number of chemical
bonds typically contains the most harnessable potential energy.
Is it true that any organism exhibiting shivering and migratory behavior is strictly
classified as an endotherm? ✔✔ False.
What specific adaptations could a newly discovered bird species, such as the Ice
Goose, use to regulate its body temperature? ✔✔ To thermoregulate, this species
might use vasoconstriction or vasodilation, adjust its metabolic rate, pant,
migrate, grow insulating down feathers, or undergo molting.
Sometimes an animal has a structural adaptation (morphological) that is adapted
for a very specific function. Similar to the thick double-layer fur of a sea otter acts
to trap air and repel water as insulation in a cold marine environment.
Which of the following would be another morphological adaptation for cold
weather? -ANSWER ✔✔Small ears that limit the time blood vessels spend in
appendages
, Like most organisms, salmon have a fairly narrow range of acceptable osmolarities
(salinity) in their internal tissues. However, salmon are born in freshwater and then
spend years 2-5 in the ocean before returning to freshwater streams to reproduce.
This indicates that salmon are most likely ______________ -ANSWER
✔✔osmoregulators
When an urchin eats a piece of kelp, the energy found in the kelp is lost as heat
during which processes? [Select all that apply] -ANSWER ✔✔- As ATP generated
in cellular respiration is broken down, releasing energy that can be harnessed by
enzymes to function
- As the cellulose (complex carbohydrate) in the kelp is broken down into smaller
sugars using enzymes
- As the proteins and DNA in the kelp are disassembled in the urchin digestive
system
- As glucose is broken down through cellular respiration
Why is oxygen consumption a reasonable proxy (stand-in) for metabolic rate? -
ANSWER ✔✔Because cellular respiration usually consumes oxygen as it breaks
down glucose
Are all organisms in this food web equally as important? -ANSWER ✔✔no
What type of metabolism[s] does each type of plankton utilize?
(heterotroph, autotroph, or both)
1. Zooplankton
2. Phytoplankton -ANSWER ✔✔1. heterotrophs
2. autotrophs
