reproduction Flashcards
reproduction
asexual
sexual
asexual reproduction
Animals can produce offspring without finding mates (e.g., animals who can ́t move), without using energy for producing sex cells or for mating, animals can produce more individuals in short time
ways of asexual reproduction
budding (pučanie)
fragmentation (delenie)
budding
new individual starts to grow like a bud from a parent, it enlarges and then splits off from a parent
fragmentation
individual can break its body into several pieces which then regenerate and thus can create new individuals (offspring)
sexual reproduction conditions
animals need to be mature for mating
gametes have to fuse during mating (fertilisation)
ways of sexual reproduction
hermaphroditism
external fertilisation
internal fertilisation
hermaphroditism
each individual has both female and male gametes and thus the individual can fertilize itself on its own (snails)
external fertilisation
animals (male and female) discharge their gametes into the water (e.g., fish, amphibians)
they don’t need physical contact
internal fertilisation
animals (male and female) are in direct contact during fertilization and their reproductive organs fuse together
leeking
(tokanie) mating season in birds
estrus
(ruja) mating season in mammals
mating rituals
mating dance (spiders and birds)