reproduction Flashcards
what is reproduction
reproduction is a biological process in which an organism reproduce a new individual of same kind
advantages of reproduction
-evolution of species
-ensures the continutity of a species in earth
-creates genetic variations
give an example of non-useful variation/evolution
moth
what is a chromosome
a DNA molecule that consists a part of all gentic material of an organism
types of asexual reproduction
8-fission
budding
fragementation
parthenogenesis
parthenocarpy
regeneration
sporogenesis/spore formation
vegetative propogation
an example of binary fission
amoeba, paramecium, euglena
an example of multiple fission
plasmodium
what is budding and its example
formation of an individual from a small projection, a bud, arising from a perticular site of parent body ex- yeast
what is fragmentation and its examples
an organism when matured divides its body into fragments/ sections that forms a new individual or organism
ex- spirogra, earthworm, liches
by what asexual reproduction does planeria reproduce
fragmentation
what is fragmentation
the ability of an organism to give rise to a new individual from their body parts
what asexual reproduction takes place in rizobium
sporogenesis/spore formation
what is sporogenesis
a type of asexual reproduction which involves of reproductive structures called spores
what is the difference between parthenogenesis/ parthenocarpy
prathenogenesis- unfertilization of gaments/ unfertilized eggs forms a new individual and they are the copy of their mother, happens in both plants and animals
parthenocarpy- happens only in fruits, production of fruits without fertifization, artificial method, seedless fruits
bryophyllum reproduce through
vegetative propgation from leaves
FRO in plants /flowers
stigma,style ovary— pistil
MRO in plants/flowers
anther,filament–stamen
name the parts of seed
seed coat, cotyledon, embryoaxis–plumule/future shoot , radical/future shoot
what is puberty
its the time period or stage of human development during which an individual show growth and becomes mature
what is implantation
attachments of growing embryo to the layer/wall of ureter
foetus gets its nutirents through
placenta
which gland add fluid to the sperm cells
seminal vesical and prostate gland
types of pollinations
self and cross pollination
sperm cells and seminal and prostrate gland together forms
semen
the age where mensuration freshly starts
menarch
the age where mensuration stops
menopause
STD fullform
sexually transmitted diseases
name some STD
AIDS (accuired immunodefeciency syndrome) and warts
what are contraceptions
methods or techniques to prevents pregnency
full form of IUCD
intrauterine contraceptive devices
types of contraception
machanical/barrier methods
chemical methods
surgecal methods
IUCD
