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MODULE 5
Reproduction
Asexual reproduction
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Cards (16)
Spores
1. Single cells produced by an organism and released into the environment to propagate
2. Rely on ideal environment conditions, wind & water to transport
Binary Fission
Bacteria
Protista
Vegetative reproduction
(Propagation)
1. Occurs when a new plant is produced from part of another plant
2. Very quick reproduction
Budding
1. New organism formed from an outgrowth on parent
2. When the outgrowth is large enough it frees itself from the parent
Vegetative reproduction (Propagation)
Grafts
- used commercially to produce desirable traits in flowers and fruit trees
Bulbs
- daffodils, garlic
Tubers
- potatoes (new plants can grow from the tuber)
Runners
- strawberries; new roots grow from a runner to make a new plant
Clovers
Binary Fission
1. The cell duplicates its DNA and then extends its cell membrane from the centre
2. The cell elongates from the centre in each direction until it's long enough to cleave
Parthenogenesis
1. When an individual is produced from an unfertilised egg, known as the virgin birth
2. Diploid = asexual reproduction
Binary Fission
is a very fast method of
reproduction
with the
population
of a colony sometimes doubling every 15-20 minutes
Parthenogenesis
Bees
; the queen lay
eggs
that produce females if
fertilised
and
males
(drones) if not
fertilised
Some
sharks
Fragmentation
1. Organism breaks into 2 or more pieces
2. A whole new organism is produced from each piece
3. Must have those advantageous environments to survive
Budding
Yeast
Hydra
Fungi
Protists
Budding
Yeast
Hydra
Fungi
Protists
Fragmentation
Sponges
Starfish
Plants
Animals
Fragmentation
Sponges
Starfish
Plants
Animals
Spores
Mushroom (fungi)
Prokaryotes
Protists and bacteria
Plants such as fern and mosses
Mould
Spores
Mushroom (
fungi
)
Prokaryotes
Protists
and bacteria
Plants such as
fern
and mosses
Mould