Gemmae are small, green, multicellular buds that a liverwort like Marchantia makes for asexual reproduction. They sit inside tiny cup-shaped holders on the thallus called gemma cups. Rain splashes them out, they detach, and each one grows into a brand-new plant that is a copy of the parent. Memory hook: "Gemmae are baby buds sitting in a cup, waiting for rain to jump out."
In Marchantia, gemma cups on the haploid thallus hold green multicellular buds (gemmae). Rain splashes them out; each detaches and grows by mitosis into a new haploid liverwort - asexual reproduction, no gametes.
Your doubts, answered
What exactly are gemmae in simple words?
Gemmae (one is called a gemma) are green, multicellular, asexual buds. NCERT describes them exactly like this. Think of them as tiny ready-made pieces of the plant. Each gemma can grow into a full new plant. They are a way for the liverwort to make copies of itself without any sex organs, gametes, or fertilisation.
What is a gemma cup and where is it found?
A gemma cup is a small, cup-shaped receptacle (holder) that sits on top of the thallus (flat green body) of the liverwort Marchantia. The gemmae are made and stored inside this cup. When water splashes into the cup, the gemmae get thrown out. So gemma cup = the container, gemmae = the buds inside it.
Are gemmae asexual or sexual reproduction?
Gemmae are ASEXUAL reproduction (also called vegetative reproduction). This is a very common NEET trap. There is NO fusion of gametes, no antheridia, no archegonia, and no fertilisation. The gemma just detaches and grows on its own. NEET 2025 asked this directly and the answer was 'asexual reproduction'. Do not confuse it with the sexual cycle of the liverwort.
Which plant group has gemmae and gemma cups?
Gemmae and gemma cups are found in LIVERWORTS (bryophytes), the classic example being Marchantia. NEET 2021 asked 'Gemmae are present in?' and the answer was 'Some Liverworts' - not gymnosperms, not mosses, not pteridophytes. Mosses reproduce vegetatively by fragmentation and budding, NOT by gemma cups. Remember: gemma cups belong to liverworts only.
Are gemmae haploid (n) or diploid (2n)?
Gemmae are HAPLOID (n). Reason: the main plant body of a bryophyte is the gametophyte, which is haploid. Gemmae are just buds pinched off from this haploid gametophyte body by simple mitosis, so they carry the same haploid number. Since no meiosis and no fertilisation happen, the new plant that grows is also a haploid gametophyte.
What is the difference between gemmae and spores?
Gemmae are green, multicellular buds made by MITOSIS from the gametophyte, and they grow directly into a new gametophyte (asexual/vegetative reproduction). Spores are single-celled, made by MEIOSIS inside the sporophyte capsule, and are part of the life cycle that follows fertilisation. So gemmae = multicellular + mitosis + haploid; spores = unicellular + meiosis + haploid.
⚠️ The NEET trap ✗ Gemmae are involved in sexual reproduction of the liverwort. ✓ Gemmae carry out ASEXUAL (vegetative) reproduction. They are buds that detach and grow directly into a new plant, with no gametes and no fertilisation involved. 🧠 See 'gemma' + 'bud' = copy-paste, not romance. Buds detach and grow = asexual. NEET 2025 tested exactly this.
Real NEET questions
NEET 2021
Gemmae are present in:
A · Some Gymnosperms
B · Some Liverworts ✓
C · Mosses
D · Pteridophytes
Solution: Gemmae are green, multicellular, asexual buds that develop in gemma cups on the thalli of liverworts such as Marchantia. They detach and germinate into new plants. This is a liverwort feature, not found in gymnosperms, mosses or pteridophytes. NCERT (Plant Kingdom): 'gemmae... develop in small receptacles called gemma cups located on the thalli.'
NEET 2025
In bryophytes, the gemmae help in which one of the following?
A · Nutrient absorption
B · Gaseous exchange
C · Sexual reproduction
D · Asexual reproduction ✓
Solution: Gemmae are asexual buds borne in gemma cups on the thallus. They detach from the parent body and germinate to form new individuals, which is asexual (vegetative) reproduction. They do not absorb nutrients or exchange gases, and they are separate from the sexual cycle that uses antheridia and archegonia.
NEET 2018
Which one is wrongly matched?
A · Gemma cups - Marchantia
B · Biflagellate zoospores - Brown algae
C · Uniflagellate gametes - Polysiphonia ✓
D · Unicellular organism - Chlorella
Solution: The wrong match is 'Uniflagellate gametes - Polysiphonia'. Polysiphonia is a red alga and reproduces sexually by NON-MOTILE (non-flagellated) gametes. The other three are correct: Marchantia (liverwort) bears gemma cups; brown algae produce biflagellate zoospores; Chlorella is a unicellular green alga. This confirms 'Gemma cups - Marchantia' is a correct match.
Solved Plant Kingdom NEET PYQs
Try the real previous-year questions from this chapter — each with the answer and a full solution.
Marchantia is a LIVERWORT. Its plant body is a flat, thalloid, dorsiventral structure. Gemma cups are found on this thallus. Mosses (like Funaria) have upright leafy axes and do not have gemma cups.
How do gemmae get dispersed?
Rain water splashes into the open gemma cup and throws the gemmae out. Once away from the parent, a gemma settles, detaches fully, and germinates into a new liverwort plant.
Does gemma formation involve meiosis?
No. Gemmae are pinched off from the haploid gametophyte by simple mitosis. There is no meiosis and no fertilisation, so the gemma and the new plant stay haploid (n).
Why is gemmae a favourite NEET question?
Because it links three testable ideas: (1) it is a liverwort/Marchantia feature, (2) it is asexual reproduction, and (3) it is haploid. NEET has asked it in 2018, 2021 and 2025, so it is high-yield for the Plant Kingdom chapter.
