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BioNumbers is in its infancy and there are notable gaps in the available data. Search results often contain false positives.
Please suggest missing data and references to help remedy these shortcomings (feedback box on the left).
Caution: reported numbers depend upon experimental conditions which are provided as part of the BioNumbers entry.
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PropertyOrganismValueUnitsIDDetails
Percent body fat at birth of 15 mammalian species Mammals Figure - link % 113759
Leonard WR, Robertson ML... more
Productivity of modern tropical forest/woodland and savanna ecosystems Biosphere Table - link kJ/m^2/year 113758
Leonard WR, Robertson ML... more
Geological ages (millions of years ago), brain size (cm^3), estimated male and female body weights (kg), and posterior tooth surface areas (mm^2) for selected fossil hominid species Primates Table - link N/A 113757
Leonard WR, Robertson ML... more
Emergence of Homo erectus Primates ~1.8 Mya 113752
Leonard WR, Robertson ML... more
Body mass (kg) and skeletal muscle mass (kg) of 15 primate species Primates Table - link kg 113756
Leonard WR, Robertson ML... more
Metabolic rate (RMR [resting metabolic rate], kcal per day), body mass (kg), brain mass (g) and diet quality (DQ) for 41 primate species Primates Table - link N/A 113755
Leonard WR, Robertson ML... more
Fraction of daily energy budget allocated to brain Mammals adult human ~20-25: other primates 8-10: other (non-primate) mammals 3-5 % 113754
Leonard WR, Robertson ML... more
Ratio between peak synaptic density in early childhood compared to adult density Human Homo sapiens 1.5 - 2 times higher in childhood peak 113751
Chechik G, Meilijson I... more
Ratio between energy demands per unit weight of brain and that of muscle Human Homo sapiens ~16 times higher in brain 113753
Leonard WR, Robertson ML... more
Number of plasmodesmata openings in the cell wall per square micrometer Plants 2-10 1/µm^2 100593
Nobel, P. S. "Plant ... more
Processing time of an absorbed photon by the chemical reactions leading to CO2 fixation Plants ~5 millisec 100915
Nobel, P. S. "Plant ... more
Net rate of photosynthesis JCO2 Biosphere 10 µmol CO2/m^2 /sec 100674
Nobel, P. S. "Plant ... more
Catalysis rates of photosystem units Generic 200 1/sec 100354
Nobel, P. S. "Plant ... more
Chlorophyll concentration Chloroplast ~30 mol/m^3 100343
Nobel, P. S. "Plant ... more
Water use efficency (WUE) in C3 plants Biosphere 1-3 g CO2 per kg H2O 100671
Nobel, P. S. "Plant ... more
Flux density of water vapor loss in a leaf Biosphere 4.3 milliMol H2O per m^2 per sec 100675
Nobel, P. S. "Plant ... more
Water use efficency (WUE) in C4 plants Biosphere 2-5 g CO2 per kg H2O 100672
Nobel, P. S. "Plant ... more
Time for O2 replenishment by photosynthesis Biosphere 2000 years 100471
Nobel, P. S.Plant Physiology... more
Number of bacteriochlorophylls per reaction center bacteria 70 (40-100) unitless 100218
Nobel, P. S. "Plant ... more
Number of chlorophyll per reaction center Plants 400 (100-700) unitless 100376
Nobel, P. S. "Plant ... more
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