BIO 148 - Midterm #1 Exam Questions with Correct Answers Latest Update 2025/2026
At which latitudes are most major deserts found?
A. 10 degrees from the Equator
B. 0 degrees from the Equator
C. -50 and 50 degrees from the Equator
D. -30 and 30 degrees from the Equator - Answers -30 and 30 degrees from the Equator
What is the broadest definition of stress in a biological context?
A. When an organism's key physiological processes are slowed down by environmental
conditions outside of the species' preferred range
B. When a student needs to answer 60 midterm questions in 75 minutes
C. When a plant experiences a water deficit
D. When a prey species is being chased by a predator - Answers When an organism's key
physiological processes are slowed down by environmental conditions outside of the species'
preferred range
What does the below figure tell us about nitrogen (N), phosphorus (P), and their importance in
plant community development?
A. Neither nutrient is important for ecosystems.
B. Nitrogen is important in early development; phosphorus is most important in mature
ecosystems.
C. Phosphorus is most important in early development; nitrogen is most important in mature
ecosystems.
D. Both nutrients are always equally important for ecosystems. - Answers Nitrogen is important
in early development; phosphorus is most important in mature ecosystems.
At which latitudes is NPP greatest?
, A. The tropics for both oceanic and terrestrial ecosystems
B. Mid-latitudes for oceanic ecosystems and the tropics for terrestrial ecosystems
C. The tropics for oceanic ecosystems and the mid-latitudes for terrestrial ecosystems
D. Mid-latitudes for both oceanic and terrestrial ecosystems - Answers Mid-latitudes for oceanic
ecosystems and the tropics for terrestrial ecosystems
What best describes a Type 3 survivorship curve?
A. Most individuals die as juveniles and a few survive to old age.
B. There is a constant death rate across the organism's lifetime.
C. Most individuals survive to old age and then all die. - Answers Most individuals die as
juveniles and a few survive to old age.
True or False: A species maintains the same population density across its entire range. -
Answers False
What do plants do to cool themselves down?
A. Photorespiration
B. Transpiration
C. Photosynthesis - Answers
An allele is
A. A disconnected part of a metapopulation
B. A cause of extinction in small populations
C. A version of a gene that encodes for a particular variant of the protein that the gene encodes
D. Life-stage of a insect species that disperses away from its birthplace - Answers A version of
a gene that encodes for a particular variant of the protein that the gene encodes
Which process turns ammonium (NH4+) and ammonia (NH3) into nitrate (NO3-), therefore
making it available to plants?
At which latitudes are most major deserts found?
A. 10 degrees from the Equator
B. 0 degrees from the Equator
C. -50 and 50 degrees from the Equator
D. -30 and 30 degrees from the Equator - Answers -30 and 30 degrees from the Equator
What is the broadest definition of stress in a biological context?
A. When an organism's key physiological processes are slowed down by environmental
conditions outside of the species' preferred range
B. When a student needs to answer 60 midterm questions in 75 minutes
C. When a plant experiences a water deficit
D. When a prey species is being chased by a predator - Answers When an organism's key
physiological processes are slowed down by environmental conditions outside of the species'
preferred range
What does the below figure tell us about nitrogen (N), phosphorus (P), and their importance in
plant community development?
A. Neither nutrient is important for ecosystems.
B. Nitrogen is important in early development; phosphorus is most important in mature
ecosystems.
C. Phosphorus is most important in early development; nitrogen is most important in mature
ecosystems.
D. Both nutrients are always equally important for ecosystems. - Answers Nitrogen is important
in early development; phosphorus is most important in mature ecosystems.
At which latitudes is NPP greatest?
, A. The tropics for both oceanic and terrestrial ecosystems
B. Mid-latitudes for oceanic ecosystems and the tropics for terrestrial ecosystems
C. The tropics for oceanic ecosystems and the mid-latitudes for terrestrial ecosystems
D. Mid-latitudes for both oceanic and terrestrial ecosystems - Answers Mid-latitudes for oceanic
ecosystems and the tropics for terrestrial ecosystems
What best describes a Type 3 survivorship curve?
A. Most individuals die as juveniles and a few survive to old age.
B. There is a constant death rate across the organism's lifetime.
C. Most individuals survive to old age and then all die. - Answers Most individuals die as
juveniles and a few survive to old age.
True or False: A species maintains the same population density across its entire range. -
Answers False
What do plants do to cool themselves down?
A. Photorespiration
B. Transpiration
C. Photosynthesis - Answers
An allele is
A. A disconnected part of a metapopulation
B. A cause of extinction in small populations
C. A version of a gene that encodes for a particular variant of the protein that the gene encodes
D. Life-stage of a insect species that disperses away from its birthplace - Answers A version of
a gene that encodes for a particular variant of the protein that the gene encodes
Which process turns ammonium (NH4+) and ammonia (NH3) into nitrate (NO3-), therefore
making it available to plants?
