test one quiz portion
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Altruism is more likely when
individuals are closely related, the reproductive cost of helping is relatively low compared to the benefits of helping
C4 photosynthesis evolved in
hot, bright tropical environments
Plant material is not a very nutritious food source for herbivores because
plant material is composed primarily of carbon-rich compounds that are hard to digest
Reproduction in females is primarily limited by
access to resources
Leaves of plants adapted to full sunlight typically have
a high rate of maximum light-saturated photosynthesis (Pmax), a high respiration rate, a high light-compensation point
According to optimal foraging theory, a specialist predator likely
expends a high amount of energy handling additional prey items., expends a high amount of energy searching for additional prey items.
The beetle would conserve more of its internal water when
it was in the shade because the vapor pressure deficit between the beetle and the air would be lower.
In CAM photosynthesis
CO2 is fixed by PEP carboxylase and RUBISCO in the mesophyll.
For water to move from the soil, through plants, and into the atmosphere, the water potential (Ψ) gradient must be
Ψsoil > Ψroot > Ψstem > Ψleaf > Ψair
Plants can increase their water uptake by
increasing the relative amount of biomass allocated to roots.
Photorespiration only occurs in C3 plants
Zone in a river that is likely to experience the smallest variation in temperature
Current that originates near the equator and keeps the temperature of the United Kingdom warmer than it would be given its latitude
Ecosystem that is found at the intersection between marine and freshwater ecosystems
Marine intertidal zone that is likely to experience the highest variation in salinity
Type of marine shallow water ecosystem that you would likely find in the temperate zone
Zone in a river that is likely to experience the smallest variation in temperature. – Deep pool,
Current that originates near the equator and keeps the temperature of the United Kingdom warmer than it would be given its latitude. – Gulf stream
Ecosystem that is found at the intersection between marine and freshwater ecosystems. – Estuary
Marine intertidal zone that is likely to experience the highest variation in salinity. – Upper intertidal
Type of marine shallow water ecosystem that you would likely find in the temperate zone. – Kelp forest
Seasonal changes in body color directly affect the total heat stored in an organism by
affecting the amount of heat gained/lost from radiation
An ectothermic organism that basks on a hot surface is increasing its energy storage by
increasing the amount of energy gained by conduction
Which of the following energy balance equations is most suited to ectothermic animals?
HS = Hcd + Hcv + Hr - He
Temperature affects the distribution of
both ectothermic and endothermic organisms
The metabolic rate of an endothermic organism increases exponentially as temperature increases
Deserts are often found
At 30 degrees N and S latitude, On the lee (back-slope) of mountain ranges
The most conclusive way to determine if temperature is an important variable for controlling the reproductive output of a given plant is to
conduct an experiment where the reproductive output of individuals exposed to different temperatures is measured
Simulation models must be able to accurately predict an ecological phenomenon if they are to be useful for ecological studies.
Desert ecosystems are defined as hot and dry because temperature always exceeds rainfall
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