Mosses, Ferns and Gymnosperms

Mosses, Ferns and Gymnosperms - Moss Botanically mosses are...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Moss Botanically, mosses are bryophytes , or non-vascular plants . They differ from 'higher' plants by not having internal water- bearing vessels or veins, and no flowers and therefore no fruits, cones or seeds. They are small (a few centimeters tall) and herbaceous (nonwoody) and absorb water and nutrients through their leaves. Mosses have stems which may be simple or branched and upright or lax, simple leaves that often have midribs, roots ( rhizoids ) that anchor them to their substrate, and spore-bearing capsules on long stems. They harvest sunlight to create food through photosynthesis. [3] [4] Mosses do not absorb water or nutrients from their substrate through their roots, so while mosses often grow on trees, they are never parasitic on the tree. In addition to lacking a vascular system , mosses have a gametophyte -dominant life cycle , i.e. the plant's cells are haploid for most of its life cycle. [5] Sporophytes (i.e. the diploid body) are short-lived and dependent on the gametophyte. This is in contrast to the pattern exhibited by most "higher" plants and by most animals. In seed plants , the haploid generation is represented by the pollen and the ovule, whilst the diploid generation is the familiar flowering plant. Mosses exhibit this alternation of generations:
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Alternation of Generation: 1. Starting at the Moss gametophyte, there are two sexes of gametophytes, male and female. In the top of each Moss gametophytes, there are structures. On the top of the male, there is a structure called the antheridium, anther means the male organ in plants&flower. The female moss plant, has her structure at
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/11/2011 for the course BIO 101 taught by Professor Martin during the Spring '08 term at Rutgers.

Page1 / 5

Mosses, Ferns and Gymnosperms - Moss Botanically mosses are...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online