Class Flashcards
(15 cards)
What is the main plant body of bryophytes called?
Gametophyte
The gametophyte is responsible for producing gametes in bryophytes.
What are the sex organs in bryophytes called?
Antheridium (male) and Archegonium (female)
The antheridium produces biflagellate antherozoids, while the archegonium is flask-shaped and produces a single egg.
How do antherozoids reach the egg in bryophytes?
They are released into water
Antherozoids swim in water to contact the archegonium.
What happens when an antherozoid fuses with an egg?
Produces a zygote
The zygote develops into a sporophyte.
Do zygotes in bryophytes undergo meiosis immediately?
No
Zygotes develop into a multicellular sporophyte before undergoing meiosis.
What is the role of the sporophyte in bryophytes?
It is attached to the gametophyte and derives nourishment from it
The sporophyte is not free-living.
What do some cells of the sporophyte undergo to produce spores?
Reduction division (meiosis)
This process results in haploid spores.
What do haploid spores germinate to produce?
Gametophyte
Spores give rise to new gametophytes.
What structures do bryophytes lack?
True roots, stems, or leaves
They may have root-like, leaf-like, or stem-like structures.
What is the ecological role of bryophytes?
Important in plant succession on bare substrates
They help in the colonization of harsh environments.
In which type of locations do bryophytes commonly grow?
Humid and shaded localities
They are often found in moist environments.
What is the body structure of bryophytes compared to algae?
More differentiated
Bryophytes have a more complex structure than algae.
Fill in the blank: The male sex organ in bryophytes is called the _______.
Antheridium
Fill in the blank: The female sex organ in bryophytes is called the _______.
Archegonium
True or False: Bryophytes are independent of water for reproduction.
False
Water is essential for the movement of antherozoids to the egg.
