Reproduction-rete testis Flashcards
definition of reproduction
to make a copy
characteristics of asexual reproduction
1 parent, no variety, poor survival, many offspring
why do we have reproduction
growth and repair
where does bionary fission occur in (type of organism)
bacteria
what happens in bioanry fission
1 organism splits in half
how often do your cells reproduce
every 20 minutes
why type of reproduction is bionary fission
asexual
what organism does budding occur in
hydra or yeast
describe the basics of budding
organism grows identical buds on its side
where do hydra live
fresh water
what same animal group do hydra belong to
JellyFish
mouth/anus of hydra name
daphnia
daphnia
mouth/anus in hydra
stinging cells on hydra name
nematocysts
what happens when the bud gets big enough
it breaks off and the parent dies
characteristics of sexual reproduction
2 parents, variety, good survival, few offsprings, demanding
definition of sexual reproduction
union of 2 gametes (sex cells: egg and sperm) to form a zygote (fertilized egg)
zygote
fertilized egg
gonads
(ovaries, testes) produce gametes (sex organs)
conjugation
(paramecium) simplest sexual reproduction
example of conjugation
paramecium
describe the reproduction of paramecium
sexual; line up and shot genetic material into each other (exchange)
what are the hairs on the outside of the paramecium called
cilia
parthenogenesis
fertilization without sperm (bees) dont need males, fertilize themselves;nature values bees
what animal does parthenogenesis
bees
what type of reproduction is conjugation
sexual
what type of reproduction is parthenogenesis
sexual
definition of fertilization
union of sperm and egg
what type of fertilizations are there
indirect and direct
what type of animal groups do indirect fertilization
aquatic
describe indirect fertilization
aquatic animals, poor survival, many eggs, example (frogs); little- no parental care
example of indirect fertilization
frogs
where does indirect fertilization occur
outside the body
what do male frogs have that help them push out the females babys
thumb pads
direct variation
intercourse, terrestrial animals, good survival, few offsprings, mammals
what types of animals do direct fertilization
terrestrial animals, mammals
what do mammals have to have to be mammals
body hair and produce milk
what are the two exceptions of animals that are considered mammals
bats and whales
name the 4 differences between humans and other mammals
breeding seasons, animals in heat, humans sexually active throughout entire life, sexuality is more than having babies
how are breeding seasons regulated
hormones and temperature
what is sexuality
how you think about yourself
definition of puberty
changes in the body that make it physically possible to reproduce
when does puberty occur
adolescence
what develops during puberty
sex cells (gametes)
secondary sexual characteristics of a male
body hair, voice deepening, facial hair, muscle development, triangle shaped
secondary sexual characteristics of a female
vody hair, breast development, hip development, distribution of body fat, menstrual cycle
are males and females different
yes, strikingly different
similarities of males and females
same embryonic tissue, same hormones but different responses
at how many weeks does the “y” chromosome kick in in a male
6 weeks
functions of male
produce sperm, transfer sperm to female (intercourse)
female functions
production of eggs, reception of sperm cells from male, nurturing the developing embryo, nourishing new individual (lactation) production of female sex hormones
what is lactation
breast feeding
what are sex cells called
gametes
when does spermatogenesis occur
puberty
what is spermatogenesis
sperm production
how long does spermatogenesis occur
throughout life
where does spermatogenesis occur
seminiferous tubules
nickname for seminiferous tubules
sperm factories
where do the seminiferous tubules empty into
rete testis
