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biology lab
final
| Term | Definition |
|---|---|
| fertilization | fusion of egg and sperm nuclei |
| zygote | single celled. product of fertilization |
| mitosis | nuclear division |
| fission | splitting of a pre-existing cell into two cells |
| cytokinesis | cytoplasmic division |
| nucleoprotein | DNA protein complex |
| chromatin | a thin strand of DNA within the nucleus |
| sister chromatids | two identical condensed nucleoproteins |
| meristems | regions of active growth |
| interphase | chromatin dispersed within the bounds of the nuclear envelope |
| mitosis | consists of prophase, metaphase, anaphase, and telophase |
| prophase | chromatin condenses, making the duplicated chromosomes visible as threadlike structures. spindle fibers begin ot appear and make up the spindle, though it is not yet visible |
| metaphase | nuclear envelope is no longer distinct. sister chromatids line up midway between the two poles on the spindle equater |
| anaphase | sister chromatids of each chromosome separate, each chromatid moving toward an opposite pole |
| telophase | daughter chromosomes arrive at opposite poles. spindle organizes, chromosomes expand into chromatin form and a nuclear envelope reforms around the newly formed daughter nucleus. |
| cell-plate formation | Golgi body -derived vesicles migrate to the spindle equator where they fuse. their contents contributes to the formation of a new cell wall, and their membranes makeup the new plasma membrane |
| chromosomes | the genetic makeup of eukaryotes is organized into |
| chromatids containing centromeres and nucleoproteins | during prophase, duplicated chromosomes consist of |
| cleavage furrow | animal cells |
| cell plate formation | plant cells |
| animal cells | centrioles and a starburst cluster of spindle fibers would be found only in |
| optimal foraging theory | individuals will try to maximize their energy intake and minimize their energy/time expended on obtaining food |
| optimal foraging | dynamic aspect of ecology that should be expected to change with locality, season, and under different environmental conditions |
| gametes | meiosis forms |
| ecology | study of interactions between living organisms and their environment |
| trophic levels | feeding levels |
| true breeding | all self fertilized offspring displayed the same form of a trait as their parent |
| hybrid | offspring of parents that are true-breeding for different traits |
| gametes | contain only one of the two alleles for a specific trait |
| law of segregation | each organism contains 2 alleles for each trait, and the alleles segregate (separate) during the formation of gametes during meiosis |
| purines | adenine and guanine |
| pyrimidines | cytosine and thymine |
| Watson and crick | the individuals responsible for constructing the first model of DNA |
| deoxyribose or ribose, purines or pyrimidines, and phosphate groups | a nucleotide may consist of |
| keystone species | species that benefit other organisms and are also responsible for maintaining plat and animal diversity |
| oommensalism | one organism benefits and the other is not effected |
| mutualism | both help the other |
| parasitic | one organism lives off the other |
| 4 things fires do for plants | 1. ash from previous plants form a fertilizer for colonizing plants 2. seed germination can be stimulated by fires 3. blooming can be triggered by fires 4. non-fire adapted vegetation is prevented from invading and blocking out the sunlight |
Created by:
skmcewen
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