Asking about Life

algae allele amino acids animals antibiotics Archaea atoms auxin bacteria biologists Biology BiologyNow CD-ROM birds blood body bonds building blocks called carbon dioxide cell wall chain chapter chemical chloroplasts chromosomes contain cycle Darwin diploid disease Earth ecosystems eggs electrons embryo energy environment enzymes eukaryotes eukaryotic cells evolution evolved example extinction female Figure fish flowers forest fossil fungi gametes gametophyte genes genetic genome glucose Greek grow growth haploid human hydrogen individual insects kinds layer living male mammals meiosis membrane million mitochondria mitosis molecular molecules move mRNA muscle mutations natural selection nitrogen nucleotides nucleus nutrients organisms oxygen pair percent phenotype phloem photosynthesis plants plasmids polypeptide population produce prokaryotes proteins protists protons reaction replication reproduce researchers ribosomes roots scientists seeds sequence sexual soil species sperm stomata strand structure sugar tiny tion tissue traits trees tube vascular vertebrates virus viruses xylem zygote