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exam reproduction

asexual reproduction

formation of a new individual that hasidentical genetic information as its parent

advantages of asexual

lots if offspring produce quickly only one parent needed takes less energy

diadvantages asexual

no genetic diversity lesser chance of survival

binary fission

single celled organisms divide into two genetically identical daugter cellsthat are clones to the parent

budding

single celled organisms the nuclues divides and tiny bud forms grows on cell membrane then seperates becoming indepenedwnt

pathenogenesis

process in which unferlized haploid eggsmature into new organisms

fragmentation

new organism formed from a peice of existing parent organism

spores

cell mass produced by mitosisthat grow into new individuals if conditions favourable

vagatative reproduction

asexual reproduction of identical offspring from the oarent plant that does not involve seeds

meristerm tissue

actively growingpart of the plantcomposed of unspecialized cells produced by mitosis

sexual reproduction

reproduction th at invovles the exchange of genetic material between two organisms. two gametes combine during fertilization to form zygote- develope new individuals.

chromosomes

a normal human body contains 23 pairs ofsimilar chromosomes which are known as homologous pairs
46 in body cell

23 ingamete cell

advantages of sexual

genetic diversity, species can adapt, disease less likely

disadvantages

takes energy, protwction and care are nessacary, fewer offspring, complexity of bring gametes together

Meosis

cell division that produces unique cells called gametes Cell division that ensures each gamete countains only one half set haploid of chromosomes seperate sister chromatids

meosis 1

homologous chromosomes match up in 23 pairs and prepare to be seperated crossing over occurs

meosis

23 duplicatedchromosomes split in balf and make new chromosomes

stamen

male reproductive organ contains anther, pollen grains and filament

anther

where pollen is produced and stored

pollen grains

sacs containing male gametes

filament

stalk that supports anther

pistil

female reproductive organ that countains stigma style ovary ovules

stigma

capture pollen grains

style

stalk that supports stigma

ovary

holds ovules

ovules

sacs inside the ovarys that countain female gametes

petals

brightly coloured to attract pollinators petals make ip corolla

sepals

leaf structure that protects plant before bloom

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