What is meant by microphyll?
What is meant by microphyll?
1 : a leaf (as of a club moss) with single unbranched veins and no demonstrable gap around the leaf trace. 2 : a small leaf.
What is the difference between a megaphyll and microphyll?
Microphylls are defined as leaves of small size, with simple venation (one vein) and associated with steles that lack leaf gaps (protosteles). By contrast, megaphylls are defined as leaves of generally larger size, with complex venation and associated with leaf gaps in the stele [3].
What are microphyll leaves give example?
A leaf with only one vascular bundle and no complex network of veins. Horsetails and lycophytes (such as club mosses) have microphylls. Microphylls on modern plants are generally small but in extinct phyla the same structures could grow quite large.
What is Microphyllous and Megaphyllous?
Microphylls are the leaves with a single vein, which is unbranched. In contrast, megaphylls are the other type of leaves with multiple veins and leaf gaps. They occur in angiosperms, gymnosperms, and fronds of ferns.
What is Homospory?
: the production by various plants (such as the club mosses and horsetails) of asexual spores of only one kind.
What is the meaning of Sporophylls?
A sporophyll is a leaf that bears sporangia. In heterosporous plants, sporophylls (whether they are microphylls or megaphylls) bear either megasporangia and thus are called megasporophylls, or microsporangia and are called microsporophylls.
What evidence do Paleobotanists look for?
Paleobotanists analyse fossilized remains of extinct plants as well as microfossils such as spores, pollens and phytoliths.
What two tissues are present in each vascular bundle?
4.1. Vascular tissue is comprised of the xylem and the phloem, the main transport systems of plants. They typically occur together in vascular bundles in all plant organs, traversing roots, stems, and leaves. Xylem is responsible for the transport of water and dissolved ions from the roots upwards through the plant.
What is heterosporous condition?
HETEROSPORY :- THIS IS A CONDITION IN WHICH AN ORGANISM (PLANTS)PRODUCE TWO DIFFERENT TYPES OF GAMETES (MORPHOLOGICALLY)i.e, ONE LARGE GAMETE AND THE OTHER BEING A SMALL GAMETE OR FLAGELLATED AND NON-FLAGELLATED GAMETES IS KNOWN AS HETEROSPORY.
What is a Lycophyll?
In plant anatomy and evolution a microphyll (or lycophyll) is a type of plant leaf with one single, unbranched leaf vein. Plants with microphyll leaves occur early in the fossil record, and few such plants exist today.
What is meant by Megaphyllous?
In plant anatomy and evolution a microphyll (or lycophyll) is a type of plant leaf with one single, unbranched leaf vein. Megaphylls, in contrast, have multiple veins within the leaf and leaf gaps above them in the stem.
What is the difference between Homosporous and heterosporous?
The main difference between homosporous and heterosporous pteridophytes is that the homosporous pteridophytes produce only one type of spores whereas the heterosporous pteridophytes produce two types of spores: megaspores and microspores.
