Ch. 5 Coping With Environmental Variation: Energy Flashcards
___ is the most basic requirement for all organisms.
Energy
Sunlight is ___ energy.
Radiant
___ energy is stored in the bonds of food molecules.
Chemical
___ energy is a form of potential energy.
Chemical
___ energy associated with movement of molecules is measured as temperature.
Kinetic
Autotrophs -
Organisms that assimilate energy from sunlight or from inorganic compounds
Photosynthesis -
Organisms assimilating energy from sunlight
Chemosynthesis -
Organisms assimilating energy from inorganic compounds
Heterotrophs -
Obtain their energy by consuming energy-rich organic compounds from other organisms
Detritivores -
Consume non-living organic matter
___ and ___ are heterotrophs that consume live hosts, but do not necessarily kill them.
Parasites and herbivores
___ are heterotrophs that capture and consume live prey animals.
Predators
Holoparasite -
Have no photosynthetic pigments and obtain all their energy from other plants
Hemiparasite -
Photosynthetic, but obtains nutrients, water, and some of its energy from the host plant
Some animals can become photosynthetic by acquiring or consuming photosynthetic organisms, or living in a close relationship called ___.
Symbiosis
Electrons are used to generate two high-energy compounds:
ATP and NADPH
The biochemical pathway used most commonly to fix CO2 is the ___ ___, catalyzed by several enzymes.
Calvin cycle
Important chemosynthesizers include the __ __.
Nitrifying bacteria
Photosynthesis has two major steps:
Light reaction
Dark reaction
Light harvesting is accomplished by ___ and accessory pigments.
Chlorophyll II
In plants, the thylakoid membrane is part of a specialized organelle called a ___.
Chloroplast
__ is the most abundant enzyme on earth.
Rubisco
Atmospheric O2 led to formation of an __ __ high in atmosphere that shields organisms from high-energy ultraviolet radiation.
Ozone layer
___ ___ ___ shows relationship between light levels and photosynthesis rate.
Light response curve