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Final bio notes
Biology
| Question | Answer |
|---|---|
| Asexual | without sex- i.e. plants, bacterial, some animals |
| Budding- | one individual arises as an outgrowth of another some animals |
| Fragmentation | Fragments become new individuals ex- flatworms;muliply (regeneration) |
| Parthenogensis | an unferillized egg develops into a complete individual involves an egg- does not require a sperm |
| Sexual reproduction | Animals usually produce gamers (egg and sperm) in speoralized organs (gonads- ovaries (egg) and testes (sperm)) egg of one parent fertilized by the sperm of another (usually) |
| exception | Hermaphrododitic-animals, have both sexual organs |
| wrasses | female becomes male when there is no male |
| Copulation | the sexual union to facilate the reception of sperm by a female |
| Birth | 3 different type in animals |
| lay eggs | tend to them until they hatch |
| seahorse | female puts in pouch eggs are retained until they hatch |
| Produce a live young baby | no egg |
| Many aquatic animals have a larual stage | has a different life style than the adult i.e. tadpole, mosquito eggs in reptiles |
| not drying out | thick shell has extra embryonic membrains |
| serves the needs of the embryo | prevent drying out takes away waste as well |
| Gutermost membrane | becomes the placenta in mammals/humans exchange materials with mother |
| • o outside of body because it's to warm inside the body | too hot no sperm |
| o Protected by the scrotum | regulates tempter by bring them away and close to body |
| • epididymis | o Sperm matures here |
| • Vas deferens | o Stored here |
| • Urethra | o rejects out of body/ sperm out of the body |
| • Testes | contain seminiferoustubules |
| meiosis | produces sperm |
| haploid | half the number of chromosomes |
| • Sperm moved and stored in epididymis | matures |
| o Sperm expiration date | unused gets reabsorbed by body |
| o takes to weeks | to make sperm |
| o prostate gland | pick up milky like and neutralize the urethra |
| o Erectile dysfunction | blood doesn't go to the eretile tissue |
| o Erectile dysfunction drugs | work by increasing the blood flow to the penis |
| o blood doesn't go to the eretile tissue | this is what Viagra is for |
| o Ejaculation semen | 40 million sperm/ml, fewer than 100 sperm get close to the egg |
| • Ovaries | o contain follicles composed of developing eggs |
| • Oviducts | o Fertilization takes place in the first 1/3 of an oviduct |
| o Embryo will embed itself in the uterine lining | endometrium |
| set number at birth of how many eggs that a female has a lifetime | (400-500) |
Created by:
martinezle1
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