Do angiosperms have antheridia?
Do angiosperms have antheridia?
In angiosperms, archegonia and antheridia are absent. So, the correct answer is option D, angiosperms.
What is the function of antheridia?
Antheridia is the male sex organ and its function is to produce gametes called antherozoids. The female equivalent organ is the archegonia, which produces the egg cells.
Which condition represent double fertilization in angiosperms?
Megagametophyte. The female gametophyte, the megagametophyte, that participates in double fertilization in angiosperms which is haploid is called the embryo sac. This develops within an ovule, enclosed by the ovary at the base of a carpel.
What did the antheridia release when you added water to the male gametophyte?
The antheridia produce many biflagellate sperm cells, which require liquid water to swim to the egg cell. Archegonia in contrast produce a single egg cell located within a chamber known as the venter.
Where is the antheridia located?
Male sex organs known as antheridia and female sex organs, which are referred to as archegonia, are typically located at the tips of the main shoots of gametophyte mosses.
What is the definition of antheridia?
Definition of antheridium : the male reproductive organ of some cryptogamous plants.
What reproductive cells develop from antheridia?
An antheridium is a haploid structure or organ producing and containing male gametes (called antherozoids or sperm). The plural form is antheridia, and a structure containing one or more antheridia is called an androecium. Androecium is also the collective term for the stamens of flowering plants.
Which of the following is characterized by double fertilization?
angiosperms
Double fertilization is the characteristic feature of angiosperms This phenomenon first observed by Nawaschin, 1898 in Lilium and Fritillaria. In angiosperms one male gamete fuses with the two polar nuclei to form triploid primary endosperm ^ nucleus.
What are produced by antheridia?
Each antheridium produces numerous sperm. The eggs are produced in tiny, typically somewhat flask-like structures called archegonia. Each archegonium holds one egg (in a swollen section called the venter) and the sperm enter through the channel in the narrower, tubular section (or neck).
What are antheridia plants?
The male sex organ, the antheridium, is a saclike structure made up of a jacket of sterile cells one cell thick; it encloses many cells, each of which, when mature, produces one sperm. The antheridium is usually attached to the gametophyte by a slender stalk.
What are the antheridia and Oogonia?
In differentiated gametangia, the male gamete (sperm) is produced in the antheridium, while the female gamete (egg) is formed in the oogonium.
