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Biology Terms 2 AHSGE Numbered Flash Cards Created by Lauderdale County School District By Traci Jones and Kerri Young 136. Invertebrates – animal that does not have a backbone 137. Isotonic – when the concentration of two solutions is the same 138. Lichen – symbiotic association between a fungus and a photosynthetic organism 139. Lipids – Macromolecule made mainly from carbon and hydrogen atoms; includes fats, oils, and waxes 140. Locomotion – ability to move 141. Mammals endothermic vertebrae characterized especially by the presence of hair and mammary glands 142. Mass – amount of matter in an object 143. Meiosis – type of nuclear division that occurs as part of sexual reproduction, in which the daughter cells receive the haploid number of chromosomes in varied combinations 144. Mendel’s Laws – Law of Segregation-two alleles for a trait separate when the gametes are formed; Law of Independent Assortment- states that the alleles for different genes separate independently of one another during gamete formation. 145. Metabolism – all of the chemical reactions that occur in a cell during growth and repair 146. Mitochondrion – membrane-bounded organelle in which ATP molecules are produced during the process of cellular respiration 147. Mitosis – process in which a parent nucleus produces two daughter nuclei, each having the same number and kinds of chromosomes as the parent nucleus 148. Monera – in the previous five-kingdom, the kingdom that included the Archaebacteria and Eubacteria. 149. Monocots – angiosperm whose seeds have one cotyledon 150. Monohybrid Cross - cross between parents differ by one trait 151. Multicellular – organism composed of many cells usually has organized tissues, organs, and organ systems 152. Multiple Alleles – three or more alleles of the same gene 153. Mutagens – a chemical or physical agent that interacts with DNA and causes a mutation. 154. Mutationa change in the DNA sequence that affects genetic information. 155. Mutualismsymbiotic relationship in which both species benefit from the relationship; ants and aphids- ants take care of AAAAA the aphids and the aphids produce a sweet substance the ants use for food 156. Native speciesas opposed to exotic species is one that is original to a particular region. 157. Natural disasters- mud slides, earthquakes, volcanic eruptions, tsunamis, tornados, floods, forest fires, hurricanes 158. Nitrogen cyclethe natural process by which nitrogen, either from the atmosphere or from decomposed organic material, is converted by soil bacteria to compounds that can be assimilated by plants. This incorporated nitrogen is then taken in by other organisms and subsequently released, acted on by bacteria, and made available again to the nonliving environment. 159. Nitrogen oxide- a gas produced by many types of cells 160. Non-native species (Invasive)a species, often introduced by humans, that takes hold outside its native range 161. Nonvascular plantsthe three groups of plants (liverwort, hornworts and mosses) that lack specialized conducting tissues and true roots, stems, and leaves. 162. Nucleic acidsan organic compound, either RNA or DNA whose molecules are made of one or two chains of nucleotides and carry genetic information 163. Nucleolus small, dense region within most nuclei (plural for nucleus) in which the assembly of proteins begins 164. Nucleusin a eukaryotic cell, a membranebound organelle that contains the cell’s DNA and that has a role in processes such as growth, metabolism and reproduction. 165. Offspringthe product of reproductive processes in animals or plants 166. Organ systemsone of the levels of organization with in living organisms; made of organs and all organ systems make up the organism. 167. Organellesone of the small bodies that are found in the cytoplasm of a cell and that are specialized to perform a specific function. 168. Organismany living thing 169. Organsa collection of tissues that carry out a specialized function of the body 170. Ovariesin plants, a flower structure that contains one or more ovules from which female gametophytes are produces; in animals, the female gonad that produces eggs 171. Oxygen cyclethe cycle whereby atmospheric oxygen is converted to carbon dioxide in animal respiration and regenerated by green plants in photosynthesis 172. Ozone1. O3; in the upper atmosphere; block the ultraviolet (UV) radiation of the sun 173. Parasitea type of symbiont that lives in or on another organism. 174. Parasitism a symbiotic relationship in which one organism lives in or on another organism (the host) and consequently harms it. 175. Pedigree chart that shows the relationship within a family 176. Peptidoglycan a polymer that is composed of polysaccharide and peptide chains and is found especially in bacterial cell walls. 177. Permafrosta layer of permanently frozen subsoil in the tundra. 178. Permeablehaving pores or openings that allow gases or liquids to pass through. 179. Impermeablenot permitting passage (as a gas or liquid) through a substance. 180. Phenotype physical characteristics of an organism. 181. Phenylketonuria (PKU) an inherited metabolic disorder caused by an enzyme deficiency resulting in accumulation of phenylalanine and its metabolites in the blood causing usually severe mental retardation and seizures unless phenylalanine is restricted from the diet beginning at birth 182. Phosphorusa nonmetallic element of the nitrogen family that occurs widely especially as phosphates. 183. Photosynthesisprocess by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches. 184. Pistilthe stigma, style and ovary of a plant; female portion of a plant 185. Planktontiny, free-floating organisms that occur in aquatic environments. 186. Plantaekingdom of multicellular photosynthetic autotrophs that have cell walls containing cellulose 187. Pollination transfer of pollen from the male reproductive structure to the female reproductive structure of a plant. 188. Populationsgroup of individuals of the same species that live in the same area. 189. Precipitationa deposit on the earth of hail, mist, rain, sleet, or snow ; the quantity of water deposited 190. Predation interaction in which one organism captures and feeds on another organism 191. Predatorone that preys, destroys, or devours 192. Preyan animal taken by a predator as food 193. Producersan organism that can capture energy from sunlight or chemicals and use it to produce food from inorganic compounds; also called autotrophs 194. Productelement or compound that is produced by a chemical reaction 195. Prokaryoteunicellular organism lacking a nucleus 196. Propagation (vegetative propagation) growing plants from seeds or other vegetative parts 197. Protein synthesis process of making proteins by using DNA and mRNA and takes place at the ribosome 198. Proteinsa macromolecule that contains carbon, hydrogen, oxygen, and nitrogen; needed by the body for growth and repair and to make up enzymes 199. Protistakingdom composed of eukaryotes that are not classifies as plants, animals, or a fungus 200. Pseudopodia (pseudopod)- temporary projection of cytoplasm, or a “false foot,” used by some protests for feeding or movement; amoebas use pseudopodia to move 201. Punnett Squarediagram showing the gene combinations that might result from a genetic cross 202. Radial symmetry body plan in which body parts repeat around the center of the body; characteristic of sea anemones and sea stars (echinoderms) 203. Rainforesta tropical woodland with an annual rainfall of at least 100 inches (254 centimeters) and marked by lofty broad-leaved evergreen trees forming a continuous canopy —also called tropical rain forest 204. Reactantelement or compound that enters into a chemical reaction 205. Recessive allele- the allele that is masked by the dominant allele; only expressed when each allele inherited from the parents is recessive; represented by two lowercase letters (tt) 206. Recombinant DNA- DNA produced from combining DNA from different sources 207. Regenerationin sea stars, the ability to regrow a missing arm, as long as a part of the central disk is present 208. Replicationcopying process by which a cell duplicates its DNA 209. Reproductionthe process by which plants and animals give rise to offspring and which fundamentally consists of the segregation of a portion of the parental body by a sexual or an asexual process and its subsequent growth and differentiation into a new individual 210. Reptilesany vertebrate that has dry scaly skin, lungs, and terrestrial eggs (eggs laid on land) with several protective membranes (the amniotic egg) 211. Ribosomal RNA- rRNA- type of RNA that makes up the major part of the ribosome 212. Ribosome small particle in the cell on which proteins are assembled; made of RNA and proteins 213. Ribonucleic acid (RNA)- single-stranded nucleic acid that contains the sugar ribose. 214. Rootsunderground organ in plants that absorbs water and minerals; fibrous root-part of a root system in which roots branch to such an extent that no single root grows larger than the rest (grasses have fibrous roots); taproot- primary root found in some plants that grows longer and thicker than other roots (carrots are taproots) 215. Rough Endoplasmic Reticuluminternal membrane system in cells in which lipid components of the cell membrane are assembled and some proteins are modifies; it is called rough ER because ribosomes are attached to the surface of the membrane 216. Seed embryo of a living plant that is encased in a protective covering and surrounded by a food supply 217. Self- pollinationthe pollen (containing the sperm) of a plant fertilizes the egg of the same plant; the offspring produced from selfpollination is genetically identical copy of the parent; self-pollination does not increase genetic diversity 218. Semi-aridcharacterized by light rainfall; having about 10 to 20 inches of annual rainfall 219. Aridexcessively dry; not having enough rainfall to support agriculture 220. Semi-permeable membrane (selectively)- a membrane that allows some substances to cross and prevents other substance from crossing 221. Sex-linked trait a trait that is determined by agene found on one of the sex chromosomes such as the X chromosome or the Y chromosome in humans 222. Sexual reproductionreproduction in which gametes from two parents unite 223. Sickle Cell Anemia- a recessive genetic disorder caused by a mutated allele that produces a defective form of the protein hemoglobin 224. Smooth Endoplasmic Reticulum same definition as rough ER except smooth ER does not have ribosomes attached to the membrane 225. Solute substance that is dissolved in a solvent to make a solution 226. Solutionmixture of two or more substances in which the molecules of the substances are evenly distributed 227. Solvent substance in which a solute is dissolved to form a solution 228. Speciesgroup of similar organisms that can breed and produce fertile offspring 229. Spermthe male gamete (sex cell) 230. Spontaneous generation hypothesis stating that life could arise from nonliving matter; this hypothesis has been disproven 231. Sporesa reproductive cell or multicellular structure that is resistant to environmental conditions and that can develop into an adult without fusion with another cell; haploid reproductive cell 232. Stamenthe male reproductive structure of a flower that produces pollen and consists of an anther at the tip of a filament 233. Stomata (stoma, singular form)many openings in a leaf or a stem of a plant that enable gas exchange to occur 234. Succession the replacement of a community by another at a single location over a period of time 235. Succulentsplants that have fleshy tissue that hold moisture; cacti are examples of succulents 236. Surface runoffthe water flow which occurs when soil is infiltrated to full capacity and excess water, from rain, snowmelt, or other sources flows over the land. 237. Symbiotica relationship in which two different organisms live in close association with each other 238. Body symmetry- the property of being symmetrical ; especially : correspondence in size, shape, and relative position of parts on opposite sides of a dividing line or median plane or about a center or axis; organisms can have radial or bilateral symmetry; other organisms may be asymmetrical (no symmetry) 239. Taiga (Coniferous forest) biome in which the winters are cold but summer are mild enough to allow the ground to thaw 240. Taxonomythe science of describing, naming, and classifying organisms; the taxonomic grouping are kingdom, phylum, class, order, family genus, species 241. Tay-Sachs Disease- a recessive genetic disorder that occurs in early childhood; causes deterioration of the central nervous system and death; caused by a defective form of a brain enzyme 242. Deciduous forests- relatively mild climate and plentiful rain to promote the grow of the forest; predominant trees are those that shed their leaves in the fall; warm summers, cold winters and annual rainfall of 30 to 100 inches; commons animals include deer, bears, beavers, and raccoons 243. Terrestrial biomes- biomes that are found on land 244. Testesthe primary male reproductive organ, which produce sperm cells and testosterone 245. Thymineone of the four nitrogen-containing bases found only in DNA; it is complementary to adenine 246. Tissuesa group of similar cells that perform a common function 247. Toxicitycontaining or being poisonous material especially when capable of causing death or serious debilitation 248. Transcriptionthe process of forming a nucleic acid by using another molecule as a template; particularly the process of synthesizing RNA by using one strand of a DNA molecule as a template 249. Translationthe portion of protein synthesis that takes place at ribosomes and that uses the codons in mRNA molecules to specify the sequence of amino acids in polypeptide chains 250. Transpiration the process by which plants release water vapor into the air through stomata; also the release of water vapor into the air by other organisms 251. Trophic levels one of the steps in a food chain or food pyramid; examples include producers, and primary, secondary , and tertiary consumers 252. Tundra- characterized by a layer of permafrost; long, cold, dark winters; low precipitation; musk ox, Arctic foxes, caribou, and small rodents are characteristic animals; average temperature is -25oC to 5oC 253. Turgor pressurealso called turgidity, is the main pressure of the cell contents against the cell wall in plant cells. Turgid plant cells contain more water than flaccid cells and exert a greater osmotic pressure on its cell walls; a force exerted outward on a plant cell wall by the water contained in the cell. This force gives the plant rigidity, and may help to keep it erect. Turgor can result in the bursting of a cell. 254. Unicellularcomposed of only one cell 255. Uracilone of the four nitrogen bases that combines with sugar and a phosphate group to form a nucleotide subunit of RNA; uracil is complementary to adenine and found only in RNA 256. Vacuolecell organelle that stores materials such as water, salts, proteins, and carbohydrates 257. Variation (within species) divergence in the structural or functional characteristics of an organism from the species or population norm or average; something (as an individual or group) that exhibits variation 258. Vascular bundlesplant stem structure that contains xylem and phloem tissue 259. Vascular plantsplants that contain vascular tissues to transport water, minerals and nutrients throughout the plant; contain xylem and phloem 260. Venationthe arrangement of the veins in a leaf; net venation looks like a road map (oak and maple leaves); parallel venation pattern the veins run parallel to each other (Dogwood leaf) 261. Vertebratesanimal with a vertebral column or a backbone 262. Vesicle a small cavity or sac that contains material in a eukaryotic cell; forms when part of the cell membrane surrounds the materials to be taken into the cell or transported within the cell 263. Volume amount of space occupied by an object 264. Warm-blooded (endothermic)describes the ability of an organism to maintain body temperature by producing heat internally; mammals are endothermic 265. Water-cycle the sequence of conditions through which water passes from vapor in the atmosphere through precipitation upon land or water surfaces and ultimately back into the atmosphere as a result of evaporation and transpiration 266. Wetlandsecosystem in which water either covers the soil or is present at or near the surface of the soil for at least part of the year Equation for photosynthesis…….takes place in the chloroplast in plants LIGHT 6CO2 + 6 H2O -------> C6H12O6 (Reactants) + (Products) 6O2 Equation for Respiration………takes place in the mitochondria in plants and animals C6H12O6 + (Reactants) 6O2 -------> 6CO2 + 6 H2O (Products)