16. The antherozoids of Equisetum are:
(A) Monoflagellate
(C) Tetraflagellate
(B) Biflagellate
(D) Multiflagellate
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in bryophytes are called as antheridia. They are borne on short multicellular stalks. Each antheridium is distinguishable into a stalk and the body. The antheridial body consists of a mass of androgonial cells covered by a 1-cell thick sterile jacket. These androgonial cells give rise to androcytes or antherozoid mother cells. Androcytes give rise to antherozoids. Antherozoids or spermatozoids are bi flagellate structure with a long coiled body. The antherozoids get transferred to archegonia by means of water for the fertilization.
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The antherozoids of Equisteum are MULTIFLAGELLATE. (OPTION D)
EQUISETUM -
- A plant with underground roots and aerial stems.
- They are considered an indicator of minerals and gold in the soil.
- Equisetum plant is homosporous with antheridium and archegonium as the sex organs.
- Antheridium is located on the lobe of the gymnosperms.
- Antheridium is spirally coiled with 120 flagella attached at the anterior end.
- Archegonium consists of the egg at the base of the embedded venter.
- Fertilisation takes place by the transfer of spores through the water.
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