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BIOLOGY FINAL VOCAB
BIOLOGY FINAL
| Question | Answer |
|---|---|
| Homologous structures | Structures that are similar in different species because they were inherited from a common ancestor |
| Vestigial structures | Remnants of organs or structures that had a function in ancestors but are now useless |
| Favorable traits | Characteristics that help an organism survive and reproduce |
| Natural selection | Process where organisms better adapted to their environment survive and reproduce more |
| Genetic drift | Change in allele frequencies due to random chance |
| Geographic isolation | Separation of a population by a physical barrier leading to speciation |
| Founder effect | Reduced genetic diversity when a small group starts a new population |
| Biome | Includes climate, living factors, and nonliving factors |
| Ecosystem | Interaction of living and nonliving components |
| Community | All living populations in an area |
| Population | Members of the same species in one area |
| Organism | A single living individual |
| Biotic factors | Living parts of the environment |
| Abiotic factors | Nonliving parts of the environment |
| Somatic cells | Body cells produced by mitosis |
| Gametes | Sex cells produced by meiosis |
| Chromosome | Structure made of DNA and genes that carries genetic information |
| Helicase | Enzyme that unzips DNA during replication |
| Transcription | Process where DNA is used to make RNA |
| Translation | Process where RNA is used to make a protein |
| RNA base difference | RNA uses uracil instead of thymine |
| Dominant allele | Written with an uppercase letter |
| Recessive allele | Written with a lowercase letter |
| Phenotype | Physical expression of a trait |
| Genotype | Genetic makeup of an organism |
| Homozygous | Two identical alleles |
| Heterozygous | Two different alleles |
| Sex-linked traits | Traits controlled by genes on sex chromosomes |
| Crossing over | Exchange of genetic material during meiosis |
| Inversion mutation | Chromosome segment breaks and reattaches backward |
| Heritable mutations occur in | Germ cells (gametes) |
| Nonsense mutation | Mutation that creates a STOP codon |
| Silent mutation | Mutation that does not change the protein |
| Codominance | Both traits are expressed equally |
| Incomplete dominance | Traits blend together |
| Nondisjunction | Failure of chromosomes to separate correctly |
| Photosynthesis equation | 6CO2 + 6H2O + light → C6H12O6 + 6O2 |
| Cellular respiration equation | C6H12O6 + 6O2 → 6CO2 + 6H2O + ATP |
| Anaerobic ATP yield | 2 ATP |
| Aerobic ATP yield | 36–38 ATP |
| Mitochondria | Organelle where aerobic respiration occurs |
| Chloroplast | Organelle where photosynthesis occurs |
| Enzymes | Lower activation energy to speed up reactions |
| 10 percent rule | Only 10 percent of energy passes to the next trophic level |
| Nitrogen fixation | Converts nitrogen into a usable form for plants |
| Hypertonic solution | Water leaves the cell causing it to shrink |
| Cohesion | Water sticks to water |
| Adhesion | Water sticks to other surfaces |