Foundations of Biology

adaptation animals and plants appear archegonia arise artery asexual Bacteria biology blood body carbohydrates carbon dioxide cavity cell division cell wall centrosome characteristic characters chemical chiefly chlorophyll chromatin chromosomes coelom complex Crayfish cytoplasm Diagram differentiation digestive dorsal duct Earthworm ectoderm embryo endoderm energy environment essentially evolution exhibited fact female Ferns fertilization Flowering Plants function fundamental gametes gametophyte gastrula genes germ cells germ layer germinal glands green plants Hydra individual inheritance intestine known layer leaf living matter male Mammals material membrane mesoderm metabolism micronuclei mitosis modifications multicellular muscle nature nerve nitrogen nucleus organs origin oxygen pair Paramecium parent physiology plants and animals plasm pollen proteins protoplasm reproduction result root sexual simple somatic species sperm Sphaerella spinal spores sporophyte stem structure surface SYR SYR SYR tion tissues transformed tube types typical unicellular vacuole Vertebrates Yr yR yr zygote