Earth's life-supporting zone

Living organisms and their environment

Different populations in an area

Same species in a specific area

Self-sustaining organisms

Organisms producing own food

Organisms obtaining energy from chemicals

Organisms relying on others for food

Organism consuming plants

Organism consuming other animals

Organism consuming dead organisms

Organism consuming both plants and animals

Organism recycling nutrients from dead organisms

10% energy transfer between trophic levels

Rate of new individuals born

Rate of individuals dying

Movement into a population or area

Movement out of a population or area

Factor limiting population size

Factor affecting population based on density

Factor affecting population regardless of density

Maximum population size an environment can support

Population growth without limiting factors

Population growth with limiting factors

Movement of water through Earth's systems

Cycling of nitrogen through ecosystems

Cycling of phosphorus through ecosystems

Cycling of carbon through ecosystems

Area storing more carbon than it releases

Area releasing more carbon than it absorbs

Rate of movement between carbon reservoirs

Floating marine plants crucial to ecosystems

Microscopic algae with intricate shells

Microorganisms with flagella, often in plankton

Fossil fuel formed from organic matter

Fossil fuel in gaseous form

Carbon-rich fossil fuel

Gas contributing to the greenhouse effect

Trapping of heat in the Earth's atmosphere

Range of electromagnetic waves

Long-term changes in Earth's climate

Surface reflectivity affecting temperature

Graph showing CO2 and temperature correlation over 800,000 years

Hypothetical common ancestor of all life

Classification of life into three major groups

Structures with common evolutionary origin

Structures with similar function but different evolutionary origin

Structures with no apparent function

Remnants of past life, often in rock

Two diverse animal phyla

Complete set of genes in an organism

Thread-like structure carrying genes

Basic unit of heredity

Basic unit of DNA and RNA

Allele combinations in genetics

Proportion of an allele in a population

Genetic constitution of an organism

Physical and biochemical features of an organism

Tool for predicting offspring genotypes

Human blood group classifications

Gradual change in organisms over generations

Alteration in DNA sequence

Differences in traits within a population

Processes influencing allele frequencies

Rigid outer layer including the crust and upper mantle

Microscopic algae with intricate shells

Microorganisms with flagella, often in plankton

Range of electromagnetic waves