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LAB #14 BIO 162
Animal Reproduction
Question | Answer |
---|---|
Asexual reproduction | Offspring production is “cloning” – they produce offspring that are genetically identical to themselves |
Sexual Reproduction | Offspring production to comes from production of gametes by meiosis. Offspring is genetically different. |
Budding | Offspring forms on or within a parent and eventually breaks free to live on its own |
Fission | And individual splits into two identical individuals by mitosis |
Parthenogenesis | Females produce eggs by mitosis and the resultant offspring are genetically identical to them |
Oviparous | Animals that lay eggs |
Viviparous | Animals that bear live young |
Amniotic Egg | The fetus is enveloped in a series of membranes |
Monotremes | The class of animals including duck-billed platapus and the spiny echidna that lay eggs |
Marsupials | Give live birth to young that then live in pouches |
Placental mammals | Animals that give birth to live young that develop in the mothers uterus |
Gonad | Gamete-producing structure |
Testis | The male gonad |
Spermatogenesis | The process by which spermatozoa are formed |
Seminiferous tubules | Where immature sperm develop |
Epididymis | Where sperm mature |
Erection | Male arousal involving a stiffening of the penis |
Vas Deferens | Where spermatozoa is mixed with secretions of several accessory glands |
Urethra | What carries sperm from the male to the female reproductive tract |
Prostate Glands | Prevents urinary tract infection in males |
Seminal Vesicles | Source of chemical energy for sperm movements |
Bulbourethral Gland | Lubricates tip of penis and neutralizes acids in urethra |
Ovary | The female gonad which produces ova by oogenesis |
Oogenesis | The production of ova |
Oocytes | Immature ova |
Follicles | Fluid filled sacs where oocytes develop |
Graafian follicle | A mature follicle containing an oocyte ready to be ovulated |
Ovulaiton | When a Graafian follicle ruptures and delivers the oocyteto the oviduct |
Oviduct | Uterine tube |
Corpus Luteum | A ruptured follicle |
Menstration | When the oocyte and corpus luteum both disintegrate if tfertilizatoin does not occur |
Labia majora and labia minora | Female external genitalia |
Cervic | An opening in the base of the uterus |
Endometrium | Where the zygotes travels and implants on the highly vascular inner lining |
Placenta | A structure that connects the vascular system of the mother and the fetus |
Parturition | Dilation of the cervix followed by delivery of the infant and the placenta |
Embryonic Development | Process where animals undergo cell division, differentiation, and morphogenesis |
Cell division | Where a single cell gives rise to many cells through the process of mitosis |
Differentiation | Cells become specialized into different tissues |
Morphogenesis | When the embryo begins to take shape |
Cleavage | A period as a result of fertilization marked by rapid cell |
Morula | Solid base of cells |
Blastula | When the morula develops a fluid-filled center |
Blastocoel | The fluid filled center of the blastula |
Gastrulation | When the blastula invaginates to form a two-layered gastrula |
Ectoderm | The outside layer of the gastrula |
Endoderm | The inside layer of the gastrula |
Mesoderm | The middle layer of the gastrula that forms after the endo/ectoderms |
Organogeneis | The process by which all organs are formed |
Notochord | The first “backbone” in vertebrates |
Neural tube | The embryo’s pre-cursor to the central nervous system |
Life stages | Stages of metamorphosis (such as larvae and adult) |
Metamorphosis | The process of “growing” into various life stages |
Tadpoles | The stage directly after eggs for many frogs |
Metamorph | When an animal sprouts limbs and moves onto land |