Term
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Definition
| fragments that re-grow into whole organisms |
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Term
| for bees and wasps diploid cells become _____ and haploid cells become _____ |
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Definition
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Term
| water fleas reproduce ___ most of the year then reproduce _____ before winter so offspring can survive |
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Definition
asexually diploid offspring |
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Term
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Definition
| small marine inverts. some are entirely female and reproduce parthenogenetically. some are parthenogenetic for awhile and then reproduce sexually |
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Term
| bacterially-induced parthenogenesis: |
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Definition
| unfertilized eggs become dilpoid and develop into females embryos. cannot live without host |
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Term
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Definition
| being male and female in the same individual |
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Term
| sequential hermaphroditism- |
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Definition
| some organisms can change their sex in responce to the environment cues. example if male dies a female becomes male |
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Term
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Definition
| one first and then becomes the other sex. rearrangments of the body from within |
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Term
| simultaneous hermaphroditism- |
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Definition
| organism is male and female at the same time. ex earthworms. |
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Term
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Definition
female lives as a symbiont of lobsters |
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Term
| reproductive adaptations for land: |
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Definition
1.) internal fertilization 2.) shelled eggs 3.) internal gestation |
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Term
why do land adaptaions of reproduction work? |
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Definition
conserve water in producing and allowing offspring to develop |
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Term
| 3 ways young are produced on land: |
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Definition
1.) oviparous (egg bearing). 2.) viviparous-live bearing 3.)ovovivparous(egg live bearing) |
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Term
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Definition
| egg bearing. may or may not be shelled. ex birds lizards |
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Term
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Definition
| live bearing. keep embryo in body till it can survive. ex humans |
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Term
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Definition
| both egg and live bearing. keeps egg in body, when egg hatches mother gives birth. ex. sharks guppies |
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Term
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Definition
| mammals that lay eggs. ex platypus, echidnas |
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Term
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Definition
| pouches ex. kangaroos, koalas |
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Term
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Definition
| ex. rodents, carnivores, us |
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Term
| reproduction is controlled by ______ |
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Definition
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Term
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Definition
| chemical signal produced in one part of the body that is carried to another part of the body to cause a specific effect |
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Term
| hormonemade in the brain: |
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Definition
hypothalamus- GnRH-tell another hormone to be released. goes to pituitary pituitary- LH, FSH |
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Term
small amounts of all steriods are secreted here: |
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Definition
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Term
hormones secreted in gonads? |
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Definition
steriod hormones ovaries- estrogen, progesterone testes-testosterone |
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Term
| hormon secreted by chorion of placenta: |
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Definition
chorionic gonadotropin signals to female she is pregnant. sensed by pregnancy tests |
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Term
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Definition
follicle stimulating hormone males-tells meiosis to make sperm (spermatogenesis) females- stimulates oocyte development and estradiol secretion |
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Term
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Definition
luteinizing hormone males-stimulates testosterone secretion females-stimulates ovulation, secretion of estradiol and progesterone |
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Term
| effects of testosterone and other male hormones: |
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Definition
| development and maintenance of sex organs and characteristics |
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Term
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Definition
| prepares uterus for pregnancy and maintains sex organs and characteristics |
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Term
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Definition
completes preparation for pregnancy and helps maintain pregnancy |
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Term
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Definition
-suppresses mentrual cycle ad maintains pregnancy -produced by chorion layer of embryonic tissue-not by mom |
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Term
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Definition
| if overflowed with testosterone, stop making sperm and body stops making its own testosterone. screws up organs |
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Term
| birth control contains progesterone: |
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Definition
| it shuts down production of FSH, so no egg development. fools body into thinking its pregnant |
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