life table

Examples of life table in the following topics:

• The Study of Population Dynamics

  • Demography, or the study of population dynamics, is studied using tools such as life tables and survivorship curves.
  • These demographic characteristics are often displayed in the form of a life table.
  • The tables are modeled after actuarial tables used by the insurance industry for estimating human life expectancy.
  • Life tables may include:
  • Distinguish between life tables and survivorship curves as used in demography

• Population Demography

  • Researchers originally designed demographic tools, such as life tables, to study human populations.
  • To determine insurance rates, life insurance companies developed methods to analyze life expectancies of individuals in a population.

• The Periodic Table

  • The periodic table is a means of organizing the various elements according to similar physical and chemical properties.
  • Together they form an ionic compound, NaCl, or table salt, that is safely consumed by humans everyday.
  • Life is an example of an emergent property that arises from the specific collection of molecules found in cells.
  • The different elements are organized and displayed in the periodic table.
  • The periodic table shows the atomic mass and atomic number of each element.

• Types of Biological Macromolecules

  • Biological macromolecules, the large molecules necessary for life, include carbohydrates, lipids, nucleic acids, and proteins.
  • Regular table sugar is the disaccharide sucrose (a polymer), which is composed of the monosaccharides fructose and glucose (which are monomers).

• Energy and Nutrient Requirements for Prokaryotes

  • For cells to build all of the molecules required to sustain life, they need certain substances, collectively called nutrients.
  • Table 1 summarizes carbon and energy sources in prokaryotes .
  • This table summarizes the types of energy and carbon sources for different types of prokaryotes.

• Types of Biodiversity

  • Genetic diversity, ecosystem diversity, and human-derived diversity are measures of biodiversity that currently define life on earth.
  • Nevertheless, it has been pointed out that at the current rate of species description, which according to the State of Observed Species Report is 17,000 to 20,000 new species per year, it will take close to 500 years to finish describing life on this planet.
  • This table depicts the estimates based on taxonomic group.

• Biodiversity Change through Geological Time

  • The end-Permian extinction was the largest in the history of life.
  • The oceans became largely anoxic, suffocating marine life.
  • The table shows the time that elapsed between each period.

• Transcription in Prokaryotes

  • There are 21 genetically-encoded amino acids universally found in the species from all three domains of life. ( There is a 22nd genetically-encooded amino acid, Pyl, but so far it has only been found in a handful of Archaea and Bacteria species.)

• More complex organic molecules and life

• Life Cycles of Sexually Reproducing Organisms

  • Fertilization and meiosis alternate in sexual life cycles.
  • In the diploid-dominant life cycle, the multicellular diploid stage is the most obvious life stage, as occurs with most animals, including humans.
  • There is no multicellular haploid life stage.
  • Within haploid-dominant life cycles, the multicellular haploid stage is the most obvious life stage.
  • Most fungi and algae employ a life cycle type in which the "body" of the organism, the ecologically important part of the life cycle, is haploid.