### process | photosynthesis:

Algal photosynthesis
* is the key element in the ecology of an aerobic stabilization pond.
* oxygenates all waters.

Net photosynthesis
* Most net photosynthesis occurs in biospheres.
* is gross canopy photosynthesis minus whole-plant respiration.

Oxygenic photosynthesis
* is at the heart of plant productivity
  - the most common and is seen in plants, algae and cyanobacteria
* uses two systems for capturing photons.

### process:

Phylogeny
* Phylogenies are an essential tool for understanding the evolution of life history traits
  - crucial tools in understanding biological evolution and biological mechanisms
  - provide evolutionary biologists with a framework to test evolutionary hypotheses
* Some phylogeny has variation
  - shows classifications
* biological process
* describes how species are related.
* explains why some adaptation is less than perfect.
* has problems.
* refers to the evolutionary history of one or a group of interrelated species.
* refers to the evolutionary relationships among a group of plants or animals
* supports origins.
+ Ethology, Tinbergen's four questions, Evolutionary history
  * Phylogeny explains why some adaptation is less than perfect. From where it is, there are always some possibilities which a particular species can never get to. This is because all stages in evolution must be viable, else extinction occurs.

### process | phylogeny:

Macroevolution
* Some macroevolution occurs over thousand years.
* describes what happens over long time-scales measured in millions of years.
* includes mass extinctions.
* is another way to look at population change through the fossil record
  - evolution over time
  - phylogenesis
  - said to be the change from one species to another
* is simply microevolution extrapolated over longer periods of time
  - the cumulative effect of microevolution
  - viewed as the extension of microevolution over very long time periods
* refers to large evolutionary changes that result in new species.
* requires large scale change through mutations.
* theoretical extrapolation of microevolution over very long time periods.

### process | phylogeny:

Microevolution
* Most microevolution occurs over time.
* change in the gene pool of a population, often associated with adaptation.
* describes what happens to populations over short time-scales measured in generations.
* involves changes on the small scale at the level of gene pool alleles
  - processes that lead to evolutionary changes within species
  - the evolutionary changes within a population
* is evolution within a species
* is the change in allele frequency of a population
  - within a species over time
  - study of adaptation
  - what happens in populations, between successive generations of organisms
* occurs on a small scale within a single population.
* occurs over a very long period of time within a population or species
* refers to changes in allele frequencies within a species
  - evolutionary changes within a popula- tion

Molecular phylogeny
* Molecular phylogenies are as likely to disagree with each other as are morphological phylogenies.
* Some molecular phylogeny shows characters.
* has problems.