What is sporophyll example?

What is sporophyll example?

What is sporophyll example?

A sporophyll is a leaf that bears sporangia. Both microphylls and megaphylls can be sporophylls. ... Cycads produce strobili, both pollen-producing and seed-producing, that are composed of sporophylls. Ginkgo produces microsporophylls aggregated into a pollen strobilus.

How are sporophylls formed?

The development of male and female gametophytes of seed plants (spermatophytes) takes place in micro- and megasporangia formed on modified leaves (sporophylls) in cones or in flowers. In contrast to most free-sporing plants, immature microgametophytes of seed plants are dispersed as desiccation-tolerant pollen.

What are sporophylls in gymnosperms?

Living gymnosperms are a diverse group of plants, most of which bear their sporangia in large, prominent strobili or cones. These strobili are similar to those of lycopsids and horsetails. Strobili consist of a shortened stem with several modified leaves (sporophylls) that bear sporangia.

What are sporophylls in angiosperms?

sporophyll A leaf that bears sporangia (spore-producing structures). In ferns the sporophylls are the normal foliage leaves, but in other plants the sporophylls are modified and arise in specialized structures such as the strobili (cones) of clubmosses, horsetails, and gymnosperms and the flower of angiosperms.

Do mosses have Sporophyll?

In the genus Lycopodium, the club mosses, the sporangia are closely associated with the leaves. lucidulum), the sporangium-bearing leaves (sporophylls) occur in zones among the vegetative portions of the stems. ... In most, however, the sporophylls occur in specialized compressed stems called cones or strobili.

What do strobili produce?

With the exception of flowering plants, seed plants produce ovules and pollen in different structures. Strobili bearing microsporangia are called microsporangiate strobili or pollen cones, and those bearing ovules are megasporangiate strobili or seed cones (or ovulate cones).

Where are sporophylls found?

lucidulum), the sporangium-bearing leaves (sporophylls) occur in zones among the vegetative portions of the stems. In most, however, the sporophylls occur in specialized compressed stems called cones or strobili. Each sporophyll is associated with one yellow to orange kidney-shaped sporangium.

What is the life cycle of Pteridophytes?

The life cycle of pteridophytes is a continuous reproductive process that is dominated by the sporophyte (sexual) stage of the alternation of generations. Fern spores are catapulted into the air, and the spores develop into heart-shaped haploid gametophytes that contain both male and female sex organs.

What is the life cycle of gymnosperm?

The life cycle of a gymnosperm involves alternation of generations, with a dominant sporophyte in which reduced male and female gametophytes reside. All gymnosperms are heterosporous. The male and female reproductive organs can form in cones or strobili.

Why is the carpel important to the angiosperms?

1.1 The importance of having carpels. The carpel is the female reproductive organ that encloses the ovules in the flowering plants, or angiosperms. By contrast, the ovules of the remainder of the seed plants, the gymnosperms, are most frequently naked structures borne in the axils of leaf-like organs.

How are the leaves of a sporophyll organized?

sporophylls are photosynthetic, resembling and dispersed among vegetative leaves, or scale-like and nonphotosynthetic, organized in terminal strobili; From: Plant Systematics (Second Edition), 2010

What is the difference between a sporophyll and a strobili?

It is a fertile leaf bearing reproductive structures. Lycophytes produce strobiles. In all cases, the lateral organs of strobiles are microphylls bearing sporangia. In other lycophytes, ordinary leaves can act as sporophylls and there is no organized strand.

What do carpels surround and nourish the female gametophyte?

D) Carpels surround and nourish the female gametophyte. E) Carpels consist of highly modified microsporangia. Answer: D) Carpels surround and nourish the female gametophyte. 6) Arrange the following in the correct sequence, from earliest to most recent, in which these plant traits originated.


Related Posts: