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Gametophyte in Medical News

Evolution of Plant Life Cycle

... as sporophytes, and others spend more time in the gametophyte phase. "Early in the history of plant evolution...nd mosses spend most of the cycle in a free-living gametophyte phase; the sporophyte is a small, short-lived orga...ned, as they spend most of their life cycle in the gametophyte phase, but their sporophytes---unlike those of liv...
Gametophyte in Biological Definition

Plant

...en two generations: a haploid stage, called the gametophyte , and a diploid stage, called the sporophyte . ...porophyte acts as a separate individual, while the gametophyte remains small. The first primitive seed plants...the Permian and Triassic periods. In these the gametophyte stage is completely reduced, and the sporophyte be...

Plant

...en two generations: a haploid stage, called the gametophyte , and a diploid stage, called the sporophyte . ...porophyte acts as a separate individual, while the gametophyte remains small. The first primitive seed plants...the Permian and Triassic periods. In these the gametophyte stage is completely reduced, and the sporophyte be...
Gametophyte in Biological Dictionary

Gametophyte

In plants and algae that undergo alternation of generations, a gametophyte is the multicellular structure, or phase, that is haploid, containing a single set of chromosomes: gametophyte ( ) n. Botany. The gamete-producing phase in a plant characterized by alternation of generations ... T...

Haploid gametophyte

The Alternation of phases describes the life cycle of plants, fungi and protists. A multicellular diploid phase alternates with a multicellular haploid phase. The term can be confusing for people familiar only with the life... In plants and algae that undergo alternation of generations, ...

Synergid

... synergid . synergid . One of two small cells lying near the micropyle of the embryo sac of an ... The synergid cells within the female gametophyte are essential for reproduction in angiosperms. ... the micropylar pole, the synergid cell wall is extensively ... tube and synergid ) forms...

Sporophyte

... All land plants, and some algae, have life cycles in which a haploid gametophyte generation alternates with a diploid sporophyte , the generation of a ...o the diploid generation of the moss. ... The sporophyte relies on the gametophyte to provide it with food and water, ... Sporophyte summary with 4 page...

Pollen tube

... wall of growing pollen tubes must be strong enough to withstand the ... Pollen tube growth, which delivers the sperm cells to the female gametophyte in ... about the chemical signals that steer the growth of pollen tubes toward. the ovary. ... If observing pollen tube growth in a flowe...

Pollen grain

...om? Visit LuckyVitamin.com for a wide range of quality discount vitamins and supplements. Order today. The pollen grain is actually the male gametophyte generation of seed plants (see ... Each pollen grain contains two sperm nuclei and one tube nucleus. ... ... pollen , pollen grain , d...

Ovum

...mals and embryophytes have ova. The term ovule is used for the young ovum of an animal, as well as the plant structure that carries the female gametophyte and... The Ovum , Gray's Anatomy of the Human Body, Yahoo! Education. Ovum , Online Medical Dictionary, ... Retrieved from "http://...

Nonvascular plants

...iverworts, ... Nonvascular plants , the mosses and liverworts, have the gametophyte phase dominant. ... As do many algae, the nonvascular plants employ...these structures, they are referred ... In all nonvascular plants , the gametophyte generation is the dominant generation; ... Nonvascular plants mus...

Microspore

...aces at Britannica. Assorted References characteristics ( in spore (biology) ) ...from the parent plant, but rather they germinate into microscopic gametophyte individuals that are entirely dependent upon the sporophyte plant. Gymnosperms and angiosperms form two kinds of spores: microspores,... Click o...

Microgametophyte

...ine Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. microgametophyte ( ¦mīkrōgə′mēdə′fīt ) ( botany ) The male gametophyte in plants having two types of ... A mature microspore that contains a microgametophyte ? ... microgametophyte IN BRIEF: n. - The male haploi...
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