Biology |
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Page 25
... reservoir of 14C acts as a clock , ticking away 5600 years each time its amount is reduced by half . Carbon - 14 can be used to date fossils as far back as about 50,000 years ; elements with radioactive isotopes having longer half ...
... reservoir of 14C acts as a clock , ticking away 5600 years each time its amount is reduced by half . Carbon - 14 can be used to date fossils as far back as about 50,000 years ; elements with radioactive isotopes having longer half ...
Page 27
... reservoir . There is a natural tendency for matter to move to the lowest possible state of potential energy ; in this example , water runs downhill . To restore the potential energy of a reservoir , work must be done to elevate the ...
... reservoir . There is a natural tendency for matter to move to the lowest possible state of potential energy ; in this example , water runs downhill . To restore the potential energy of a reservoir , work must be done to elevate the ...
Page 727
... reservoir of mineral nutrients that are returned gradually to the soil as microorganisms decompose the organic matter . Availability of Soil Water and Minerals After a heavy rainfall , water drains away from the larger spaces of the ...
... reservoir of mineral nutrients that are returned gradually to the soil as microorganisms decompose the organic matter . Availability of Soil Water and Minerals After a heavy rainfall , water drains away from the larger spaces of the ...
Contents
Themes in the Study of Life | 1 |
UNIT ONE The Chemistry of Life | 15 |
Atoms Molecules and Chemical Bonds | 20 |
Copyright | |
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active adaptive algae allele amino acids animals asexual atoms bacteria biology called Calvin cycle carbon cell walls cellular Chapter chemical chlorophyll chloroplasts chromosome complex covalent cycle cytoplasm diploid disease diversity electron transport chain embryo energy environment enzymes eukaryotic eukaryotic cells evolution evolutionary evolved example fertilization Figure flowers fossil function fungi gametes gametophyte gene pool genetic genome genotype glucose glycolysis haploid human hydrogen bonds inherited ions living meiosis metabolic microscope microtubules minerals mitochondria mitosis molecular mRNA multicellular mutations natural selection nitrogen nucleotide nucleus nutrients occurs organelles organic molecules oxidized oxygen pair pathway phage phenotype phosphate photosynthesis phylum plant cells plasma membrane polypeptide population produce prokaryotes protein protists proton reaction recombinant replication reproduction respiration ribosomes root seed sequence sexual soil solution speciation species sperm strand structure sugar synthesis tion tissue traits vascular vertebrates viruses xylem zygote