英文字典中文字典Word104.com



中文字典辭典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z   


安裝中文字典英文字典辭典工具!

安裝中文字典英文字典辭典工具!








  • Parthenogenesis - Wikipedia
    In animals, parthenogenesis means the development of an embryo from an unfertilized egg cell In plants, parthenogenesis is a component process of apomixis In algae, parthenogenesis can mean the development of an embryo from either an individual sperm or an individual egg
  • Parthenogenesis | Definition, Types, Facts | Britannica
    Parthenogenesis, a reproductive strategy that involves development of a female (rarely a male) gamete (sex cell) without fertilization It occurs commonly among lower plants and invertebrate animals (particularly rotifers, aphids, ants, wasps, and bees) and rarely among higher vertebrates
  • Parthenogenesis Definition and Examples - Biology Online
    Parthenogenesis occurs in many types of invertebrates including scorpions, nematodes, mites, water fleas, wasps, some bees, and other insects Parthenogenesis may occur in some vertebrate animals as well, such as amphibians, some fish, reptiles, and in few bird species
  • How some animals have ‘virgin births’: Parthenogenesis explained
    The process, called parthenogenesis, allows creatures from honey bees to rattlesnakes to have so-called “virgin births ” Such events can shock those who care for the animals
  • Explainer: What Is Parthenogenesis And Can It Help Protect Endangered . . .
    Parthenogenesis, which derives from Greek and translates to “virgin birth”, is a type of asexual reproduction in which the offspring of some species develops from the egg or female gamete without first being fertilised by the male gamete
  • Parthenogenesis: Meaning, Types and Significance - Biology Discussion
    1 The parthenogenesis serves as the means for the determination of sex in the honey bees, wasps, etc 2 The parthenogenesis supports the chromosome theory of inheritance 3 The parthenogenesis is the most simple, stable and easy process of reproduction 4 The parthenogenesis eliminates the variation from the populations 5
  • Parthenogenesis - Encyclopedia. com
    parthenogenesis is a type of asexual reproduction in which the offspring develops from unfertilized eggs It is particularly common amongst arthropods and rotifers, can also be found in some species of fish, amphibians, birds, and reptiles, but not in mammals
  • Parthenogenesis: what is and examples - Evidence Network
    Obligated parthenogenesis: Females are forced to reproduce alone and exclusively by partenogenesis Optional parthenogenesis: Females can choose between this type of asexual reproduction or sexual reproduction, depending on the conditions of the environment and the guarantee of having individuals of the opposite sex that facilitate mating and


















中文字典-英文字典  2005-2009

|中文姓名英譯,姓名翻譯 |简体中文英文字典