antherozoid
Học thuậtThân thiện
Definition
Noun: A motile, flagellated male gamete (reproductive cell) found in certain plants, including some algae, ferns, and gymnosperms. It is the male cell that swims through a film of water to reach and fertilize the female gamete (egg cell).
Usage
The term is used specifically in botany and plant biology to describe the sperm cell of non-flowering plants that require water for fertilization. - The antherozoid is released from the antheridium. - Fertilization occurs when an antherozoid fuses with an egg cell.
Examples
- Under the microscope, we observed the antherozoid swimming towards the archegonium.
- In ferns, the antherozoid is biflagellated, meaning it has two whip-like tails for propulsion.
- The presence of water is essential for the antherozoid to reach the egg.
Advanced Usage
- The term is often used in contrast to sperm, which is the analogous male gamete in animals and some plants. Antherozoid is the precise term for the motile gamete in the specific plant groups mentioned.
- In scientific descriptions, it is common to specify the plant group: e.g., "the multiflagellate antherozoid of (an alga)".
Variants and Related Words
- Spermatozoid: A synonym for antherozoid, though less commonly used in modern botany.
- Antheridium (noun): The male reproductive organ or structure that produces antherozoids.
- Archegonium (noun): The female reproductive organ that produces the egg cell, which the antherozoid fertilizes.
- Gamete (noun): A general term for a mature haploid reproductive cell (e.g., egg, sperm, antherozoid).
Synonyms
- Male gamete
- Sperm cell (in a botanical context for the specified plants)
- Spermatozoid
Notes on Different Meanings
The word antherozoid has only one specific meaning in biological science. It is not used in general English and has no idiomatic or phrasal verb applications.
Noun
- a motile male gamete of a plant such as an alga or fern or gymnosperm