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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 ... mosses spend most of the cycle in a free-living gametophyte phase; the sporophyte is a small, short-lived ... as they spend most of their life cycle in the gametophyte phase, but their sporophytes---unlike those of ...
Gametophyte in Biological Definition

Plant

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

Plant

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

Haploid gametophyte

... that undergo alternation of generations, a gametophyte is the multicellular structure, or phase, that ... , containing a single set of chromosomes: gametophyte ( ) n. Botany. The gamete-producing phase in a plant ... The alternation between haploid gametophyte and diploid sporophyte phases, known ... ...

Gametophyte

... that undergo alternation of generations, a gametophyte is the multicellular structure, or phase, that ... containing a single set of chromosomes: gametophyte ( ) n. Botany. The gamete-producing phase in a ... by alternation of generations ... The gametophyte produces male or female ... prothallium ( ...

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 ... the diploid generation of the moss. ... The sporophyte relies on the gametophyte to provide it with food and water, ... Sporophyte summary with 4 ...

Nonvascular plants

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

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 ) ...

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 ...

Pollen grain

... 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 , ...

Ovum

... 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 ... The Ovum , Gray's Anatomy of the Human Body, Yahoo! Education. Ovum , Online Medical Dictionary, ... Retrieved from ...

Microspore

... at Britannica. Assorted References characteristics ( in spore (biology) ) ... 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: ... Click ...

Microgametophyte

... 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 ...

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