Biology and Human LifeGinn, 1925 - 592 lappuses |
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Citi izdevumi - Skatīt visu
Biology and Human Life (Classic Reprint) Benjamin Charles Gruenberg Priekšskatījums nav pieejams - 2018 |
Biology and Human Life (Classic Reprint) Benjamin Charles Gruenberg Priekšskatījums nav pieejams - 2018 |
Bieži izmantoti vārdi un frāzes
activities antitoxin bacteria biology birds blood body bones breathing breeding Bulletin called carbohydrates carbon dioxid carpel cause cell division changes chap chemical chlorophyl common corpuscles cotyledons crop cultivated danger digestive diphtheria disease division of labor eggs embryo example eyes Farmers fibers fish flowers forest fruit fungi gametes glands grow growth habits heart hookworm human hybrids important increase individuals injurious insects intestine kinds larva larvæ living things lungs mammals materials means milk mosquitoes moth mouth muscles nerve one-celled organs oxygen parasites plant or animal plants and animals poison pollen pollen tube possible prevent produce protect proteins protoplasm protozoa Public Health Reprint pupa REFERENCE READINGS reflexes region root seeds skin soil species spores stamens stem stomach structure substances supply tion tissues trees tube various vertebrates vessels workers worm Yellow Yellow Yellow Λ Λ Λ
Populāri fragmenti
318. lappuse - My reasons for believing that flies were active in the dissemination of typhoid may be stated as follows : a Flies swarmed over infected fecal matter in the pits and then visited and fed upon the food prepared for the soldiers at the mess tents. In some instances where lime had recently been sprinkled over the contents of the pits, flies with their feet whitened with lime were seen walking over the food.
386. lappuse - Connecticut that no person shall be hired nor permitted to work for wages under any conditions or terms for longer hours or days of service than is consistent with his health and physical well being and ability to promote the general welfare by his increasing usefulness as a healthy and intelligent citizen. It is hereby declared that the working of any person more than eight hours in any one day in any mill, factory, or manufacturing establishment, is injurious to the physical health and well being...
v. lappuse - The report of the National Education Association committee on the "Reorganization of Science in Secondary Schools" lays down the principle of a synthetic treatment of biology. In some quarters the change appears to have gone no farther than the substitution of "plant biology" for botany, "animal biology
xiii. lappuse - American Heart Association, American Public Health Association, American Social Hygiene Association, American Society for the Control of Cancer...
324. lappuse - Mosquito life histories. Mosquitoes of the genus Anopheles, which transmit malarial parasites, differ from the common Culex in every stage. When at rest the adult Culex holds its body parallel to the surface, whereas Anopheles holds it nearly perpendicular.
232. lappuse - The tympana of our ears are therefore undergoing motions of a like complicated kind, and this complex movement is transmitted through the chain of bones in the middle ear to the inner ear, or true organ of sensation.
84. lappuse - Rigid membranous wings covered with minute scales ; complete metamorphosis ; sucking proboscis. (Examples. All moths and butterflies.) 7. Diptera ("two-wings"). Hind wings reduced to tiny knobs, or balancers ; complete metamorphosis ; sucking or piercing mouth.
510. lappuse - Mendel's law of segregation When two individuals with a pair of alternative characters are mated, the offspring will all have the character of one of the parents; this character is called the dominant one, and the alternative character is called the recessive. The hybrid offspring of such a mating is represented in the diagram by Fl.
391. lappuse - ... annually consumed in the country, but it must be considerable. Bread and butter form an important part of the diet of the people. All through the. spring and summer, from March to November, it is customary among the farmers and working classes to eat a lunch of bread and butter and cold meat or cheese in the middle of the forenoon, and another in the middle of the afternoon. And at the three regular meals of breakfast, dinner, and supper, bread and butter are, as a rule, also eaten freely. And...
545. lappuse - The reason obviously is that the oil in them is not now needed. But conservation should include privately owned as well as publicly owned oil deposits, just as it should include privately owned forests. Private oil properties are sufficient for present needs and as Pinchot says, "This generation has a right to all it needs, but no right whatever to waste what it does not need.