英和和英

出典:『Wikipedia』 (2011/06/06 02:34 UTC 版)

英語による解説

引用

Dioecious (Greek: "two households") is the property of a group of bilogical organisms that have males and females, but not members that have organs of both sexes at the same time. I.e., those whose individual members can usually produce only one type of gamete; each individual organism is thus distinctly female or male. The majority of animal species (for example, all mammals and most reptiles) are dioecious. The term is rarely used for animals, probably because it is the common state for animals. The term is most often used in plants. The majority of plant species is monoecious, hence has either bisexual flowers or possesses both male and female flowers on the same plant, but still a large number of plant species is dioecious. See plant sexuality, for a full description of more complicated situations in plants.