The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, Literature and General Information, المجلد 23;المجلدات 704-736Cambridge University Press, 1911 |
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الصفحة 117
... gametes may be regarded as special kinds of spores which appear in two forms , the egg- cell , ovum or female gamete ... gametes are unlike ; the fusion is chiefly nuclear , and the process is the prelude of the development of the zygote ...
... gametes may be regarded as special kinds of spores which appear in two forms , the egg- cell , ovum or female gamete ... gametes are unlike ; the fusion is chiefly nuclear , and the process is the prelude of the development of the zygote ...
الصفحة 118
... gametes to form the zygote , occurs . Alcmaeon ( 580 B.C. ) is believed first to have laid down that fertilization ... gametes appears to be chemotactic and to consist of some substance positively attractive to the male gamete ...
... gametes to form the zygote , occurs . Alcmaeon ( 580 B.C. ) is believed first to have laid down that fertilization ... gametes appears to be chemotactic and to consist of some substance positively attractive to the male gamete ...
الصفحة 119
... gamete without previous conjugation with the male gamete , and is to be regarded as secondary to and degenerate from true sexual reproduction . Aristotle recognized that it occurred in the bee . In 1745 C. Bonnet showed that it must ...
... gamete without previous conjugation with the male gamete , and is to be regarded as secondary to and degenerate from true sexual reproduction . Aristotle recognized that it occurred in the bee . In 1745 C. Bonnet showed that it must ...
الصفحة 120
... gametes meeting for fertilization . It is to be noted that as the gametes are simply cells proliferating from the germinal tissue , the poten- tial number that can be produced is almost indefinite ; and as it is found that in very ...
... gametes meeting for fertilization . It is to be noted that as the gametes are simply cells proliferating from the germinal tissue , the poten- tial number that can be produced is almost indefinite ; and as it is found that in very ...
الصفحة 121
... gametes . In some exceptional cases the normal mode of reproduction , sexual or asexual , does not take place : instead , the new organism is developed vegetatively from the parent . When sexual reproduction is suppressed the case is ...
... gametes . In some exceptional cases the normal mode of reproduction , sexual or asexual , does not take place : instead , the new organism is developed vegetatively from the parent . When sexual reproduction is suppressed the case is ...
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عبارات ومصطلحات مألوفة
acid Africa Amphisbaenidae ancient Anguidae animals Apocalypse appears authority became body bone British bronchi Bulawayo carbon dioxide cartilage cells centre century Chelonians Christian Church cloaca common connexion council court crocodiles Crocodilia death developed dorsal ducts elected electors England English especially female France French gametophyte German glands Greek Henry House Iguanidae important island Italian king known later lizards Lobengula London Lord lungs male Matabele medieval meiosis membrane ment modern muscles nature opisthoglyphous organs original ovum oxygen papal Paris parish parliamentary party period pope portion posterior produced quadrate railway Reformation refraction religion religious Rembrandt Renaissance rent represented reproduction reptiles rhetoric Rhine Rhodes Rhodesia rhodium rhyolites rhythm ribs Richard river Roman Rome sexual side snakes spermatozoa Sphenodon spores sporophyte squamosal temperature term tion tissue tortoises town ventral vertebrae Viperidae vols vote zygote