producing gametophytes

Listing 1 - 10 from 12 for producing gametophytes

Vascular Plants
... into the sporophytic generation in angiosperms, although it may be independent in some vascular plants. Heterospory is unique to vascular plants; two different spores form egg-producing gametophytes and sperm-producing gametophytes. Vascular plants have also developed a waxy outer covering called the cuticle which protects from desiccation due to water loss. Specialized pores on the cuticle ...
ncsu.edu

Division Lycophyta
... the stem in which the vascular strand is simple, a trace, a single vein. The spore producing bodies are on special branches and the structure is known as a "strobilus". The sporangia which ... the base of leaves, and 2) two types of spores (heterosporous), microspores and megaspores, which give rise to male and female gametophytes and sperm cells with two flagella. The development of the gametophytes ...
home.manhattan.edu

Bryophytes
... is "ephemeral". The seta (sporophyte stalk) elongates rapidly and then the spores are dispersed Division - Anthocerotophyta (Hornworts) Hornworts have rounded, small, thallose-like gametophytes which are found in moist shaded soils. The gametophytes may be unisexual or bisexual, depending on the species. The sporophyte is "horn-shaped", and grows from a basal sheath beneath the surface of the ...
scidiv.bcc.ctc.edu

Fern Allies
... . Click here to see this. Three features distinguish Selaginella from Lycopodium;- Heterospory: Selaginella produces microspores and megaspores; Lycopodium is homosporous, producing only microspores. Endospory: Selaginella microspores and megaspores develop their gametophytes within the actual walls of the spores; in Lycopodium the gametophyte grows out of the spore. Ligule: Each leaf in ...
scitec.uwichill.edu.bb

The Evolution of Seeds
... that the seed habit is thought to have evolved. The evolution of the seed reduced the vulnerable gametophyte phase of the life cycle drastically. Whereas before dispersal depended on spores taking gametophytes (and ultimately sporophytes) to new habitats, the seed is the new means of dispersal. The first seed plants were gymnosperms (or "naked-seed" plants) and first appeared in the Devonian ...
scitec.uwichill.edu.bb More from this site

t
... a complete absence of conspicuous flowers and fruit, the production of minute fine spores, often in copious quantities, and by alternating generations of separate spore producing plants (sporophytes) and gamete producing plants (gametophytes). In these respects they are similar to the structurally less complex bryophytes or mosses and liverworts. In the bryophytes the gametophyte is the dominant ...
www.anbg.gov.au

untitled
... gametes before fertile seeds can be produced. POLLEN TUBE: This is the tube that develops from the wall of the pollen grain in seed plants, providing a passage way for the male gametophytes to reach the embryo sac for fertilization. POLLINARIUM (pl. pollinaria): A functional unit in Orchid pollination that consists of two or more pollinia, stalk or stipe, and viscidium. POLLINIUM (pl. pollinia): ...
www.botany.com

PLANT PROPAGATION
... SPOROPHYTES (SPORE-oh-fights) which have visible roots, stems and leaves. During the first phase of growing ferns, sterile conditions are critical. Moss, fungi and algae compete aggressively with young fern gametophytes. Sow spores on top of a pasteurized (sterile), moist, soilless mix or sphagnum peat in a disinfested container. Water must also be sterile. It takes from 3 to 6 months to grow ...
www.hcs.ohio-state.edu

UCMP Glossary: H
... -- Producing two different kinds of sporangia, specifically microsporangia and megasporangia. Compare with heterosporous. heterosporous -- Producing two different sizes or kinds of spores. These may come from the same or different sporangia, and may produce similar or different gametophytes. Contrast with homosporous, and compare with heterosporangiate. hierarchy -- A series in which each element ...
www.ucmp.berkeley.edu

UCMP Glossary: Botany
... two different sizes or kinds of spores. These may come from the same or different sporangia, and may produce similar or different gametophytes. Contrast with homosporous, and compare with heterosporangiate. holdfast -- Anchoring base of an alga. homosporous -- Producing only one size or kind of spore. Contrast with heterosporous. hypha -- n.Threadlike filaments that form the mycelium (body) of a ...
www.ucmp.berkeley.edu More from this site