Index - 713 



Metamerism, 647 



Metamorphosis, 414, 415, 416, 561 



Metanephros, 284 



Metaphase, in mitosis, 44—46 



Metatasis, 48 



Metatheria, 673 



Metazoa, gastric vacuoles of primitive, 291-92 



Methane, organic compound, 77 



Michaelis, L., 104-05 



Microdissection, 32, 34 



Microgametes, 59, 61 



Microinjection experiments, 31, 32 



Micromanipulator, 32 



Microscopes (see Electron microscope; Light 

 microscope) 



Microsporangia, 214, 217-18, 219 



Microspores, 214, 218, 219, 614 



Midget, pituitary, 410 



Miescher. F., 520 



Mildews, 173. 604 



Miller, }. F. A. P., 335, 337 



Miller, S., 186 



Millipedes. 655, 656 



Mimosa pudica, 259-60 



Mirsky, A. E.. 520. 521 



Mitchison, M., 48 



Mitochondria, 7, 23, 28, 147 



Mitosis, 40, 41-49, 205. 207, 211, 221, 276; ana- 

 phase, 42-46; metakinesis, 44-46; metaphase, 

 44-46; primitive forms of, 49; problems, 47-49; 

 prophase, 41-44, 45; significance of, 49-50; 

 telophase, 42, 43, 45, 46-47 



Mitotic apparatus, 31, 41, 44 



Mitotic centers, 41 



Mixing, chemical combinations vs., 69 



Mixotrophic nutrition, 178, 182 



Mixtures, substances vs., 68-69 



Molds, 17, 36, 37, 173; bread. 175-76, 210, 211; 

 economic importance of, 176; slime, 17, 36, 37, 

 602-04 



Molecular energy, 66 



Molecular polarity, 92 



Molecules, atoms vs., 67-68; colloidal, 117; com- 

 position of matter, 67; high-energy phosphate, 

 143; ion carrier, 123; size of, 117 



Mollusca, 649-54; characteristics of, 649-53; classes 

 of, 653-54; phylogenetic relationships, 653 



Molting, 417 



Mongolism, 507-08 



Monocotyledoneae , 621 



Monosaccharides, 79, 80 



Monotremata, 673 



Morgan's laws, 495 



Morphogenesis, determination, 533-34; embryonic 

 organizers, 534-36; problems of, 532-36 



Morphology, 14 



Mosaic disease, 8 



Moscona, A. A., 532. 533 



Moss. 610-11; club, 613; Irish, 601; life cycle of. 

 208, 212-14, 215; nutrition of, 240-41; reindeer, 

 607, 610 



Motor tract, main, central nervous system, 464-65 



Mountain sickness, 363 



Mouth, 283. 292, 294 



Movements, amoeboid. 91, 196-98; breathing. 

 361-62; Brownian, 92; ciliary, 195-96; colonic, 

 315-16; euglenoid, 596; growth, 259. 261-67; 

 kinetic, 112; mass, 114; pendular, 314; peri- 

 staltic, 314, 315; sleep, 261, 262; small intestine, 

 314; thermal, 92, 112; turgor, 259-61, 262 



MSH (see Melanocyte-stimulating hormone) 



Mucoproteins, 34 



Mucor, 174 



Mucosa, 285, 298, 299, 303 



Mucous glands, unicellular, 298 



Multicellular animals, Annelida, 647-49; Arthro- 

 poda, 654-60; asexual multiplication in, 393- 

 96; Brachiopoda, 643-44, 645; Bryozoa, 642-43, 

 644; Chordata, 664-76; Coelenterata, 630-34; 

 Ctenophora, 634-35; digestive system in, 291- 

 96; Echinodermata, 660-64; excretory process 

 in, 369-71; homeothermic, 582; hormones of, 

 414-16; Mollusca, 649-54; Nemathelminthes 

 (nematodes), 644-47; Nemertinea, 641; nervous 

 system, 447-70; neurons in vertebrate, 453- 

 55; nutrition, mode of, 126-28; Platyhelminlhes, 

 635-41; Porifera, 629-30; reproduction in, 380- 

 96; responses of, 431-45; Rotifera, 641-42, 643; 

 vertebrate (see Vertebrata) 



Multicellular glands, 296 



Multicellular plants, adaptation to land environ- 

 ment, 609-10; embryos of, protection of, 610; 

 excretion, 256; growth and development in, 

 228-34; haploidy and diploidy in, 205-07; in- 

 sectivorous, 261; land and environment, 238- 

 39; life cycles in various, 203-05, 207-28; me- 

 tabolism in, 253-55; nutrition of, 126-28, 236- 

 57; organic substances in, distribution of, 253; 

 products of, economic importance of, 257; re- 

 production in, 203-34; respiration in, 255-56; 

 responses of, 259-67; seed plants (see Seed 

 plants); storage problem among, 257; vascular 

 (see Vascular plants) 



Multiplication of organisms, 538-41 



Muscij 610 



Muscle tissue, 286-87 



Muscles. 431; cardiac, 286, 287, 439-40; skeletal, 

 17, 286, 287, 431-39, 460; visceral, 286, 287, 

 328, 439-40 



Muscularis, 298 



Musculature, origin of, 283 



Mushrooms, 173, 606, 608 



Mussels, 653 



Mutation, 510-13, 512, 543, 552; chromosomal, 



