It was introduced in ________ due to its beautiful flowers and the shape of its leaves.
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Euglena
In ________, longitudinal binary fission takes place.
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Deprives
________ oxygen which leads to the death of fish.
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vegetative reproduction
It is called ________ in plants.
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Clones
________ are morphologically and genetically similar.
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Zoospores
Chlamydomonas
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Conidia
Penicillium
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Buds
Hydra
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Gemmules
Sponges
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Vegetative propagules
Give rise to new offspring
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Rhizome
Ginger, Banana
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Tuber
Potato
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Leaf buds
Bryophyllum, Kalanchoe
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Bulbil
Agave
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Bulb
Onion
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Offset
Pistia, Eichhornia, Water Hyacinth
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eg
Hydra, fliamentous mosses, sprirogyra etc
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Terror of Bengal
Water Hyacinth
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life span
The period from birth to the natural death of an organism represents its life span
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asexual reproduction
When offspring is produced by a single parent with or without the involvement of gamete formation, the reproduction is asexual.
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sexual reproduction
When two parents (opposite sex) participate in the reproductive process and also involve the fusion of male and female gametes, it is called sexual reproduction.
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clone
morphological and genetically similar organisms.
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binary fission
Many single-celled organisms reproduce by binary fission, where a cell divides into two halves and each rapidly grows into an adult. Amoeba (simple), Paramecium (transverse), Euglena (longitudinal)
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encystation
Under unfavourable condition the Amoeba withdraws its pseudopodia and secretes a three-layered hard covering or cyst around itself. This phenomenon is termed as encystation.
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sporulation
the spores are liberated in the surrounding medium to grow up into many amoebae. This phenomenon is known as sporulation.
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multiple fission
When favorable conditions return, the encysted Amoeba divides by multiple fission and produces many-minute amoeba or pseudopodiospores.
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budding
In yeast, the division is unequal and small buds are produced that remain attached initially to the parent cell which, eventually gets separated and mature into new yeast organisms.
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vegetative propagules
It gives rise to new offspring. rhizome: ginger, banana leaf buds: bryophyllum offset: water haycinth bulbil: agave bulb: onion tuber: potato
the phase when the organism undergoes the changes to reach the reproductive phase.
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reproductive phase
the phase in which due to reproductive processes organisms produce offspring.
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senescence
the phase when all the metabolic processes slow down and organisms die.
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pre-fertilization
These include all the events of sexual reproduction prior to the fusion of gametes. The two main pre-fertilization events are gametogenesis and gamete transfer.
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fertilization
creation by the physical union of male and female gametes; of sperm and ova in an animal or pollen and ovule in a plant
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post-fertilization
Events in sexual reproduction after the formation of zygote are called post-fertilization events.
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embryo
Inside the mature seed is the progenitor of the next generation, the embryo.
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zygote
The vital link between generations.
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post-fertilization changes in plants
ovule ---> seed ovary ---> fruit, pericarp zygote ---> embryo anther, petals, sepals fall down
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gametogenesis
gametogenesis refers to the process of formation of the two types of gametes – male and female.
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heterogametes
in a majority of sexually reproducing organisms the gametes produced are of two morphologically distinct types (heterogametes). In such organisms the male gamete is called the antherozoid or sperm and the female gamete is called the egg or ovum.
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homogametes
In some algae, the two gametes are so similar in appearance that it is not possible to categorize them into male and female gametes. They are hence called homogametes (isogametes)
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turion
fleshy buds of aquatic plants
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neoteny
`it is the retention of larval characters
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paedogenesis
small flies like miastor, reproduction occurs in larval stage
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regeneration
growth anew of lost tissue or destroyed parts or organs
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morphallaxis
regeneration on a reduced scale of a body part; observed especially in invertebrates such as certain lobsters
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epimorphosis
epimorphosis is defined as the regeneration of a specific part of an organism.
Studied by 4 people
Note 
Flashcard (73)