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Biology 121 UBC Exam Questions with Correct Answers directional selection - ANSWER-one extreme variation is favoured stabilizing selection - ANSWER-non extreme traits selected for disruptive selection - ANSWER-extreme traits selected for balancing selection - ANSWER-one favoured allele selected for nondisjunction - ANSWER-error in meiosis when sister chromosomes fail to separate null hypothesis - ANSWER-predicts no change alternate hypothesis - ANSWER-predicts change ev...

Biology 121 Test Review (Chapters 1-5) Questions with Complete Answers The conversion of starting materials? - ANSWER-The reactants The material resulting from the chemical reaction? - ANSWER-The products What is the tendency of molecules of the same kind to stick together? - ANSWER-Cohesion What is the clinging of one substance to another? - ANSWER-Adhesion What is the energy associated with the random movement of atoms and molecules? - ANSWER-Thermal energy What is the meas...

Biology 121 Midterm Exam- U of S Questions and Answers apex predator - ANSWER-lack natural predator (killer whales for example) Hunting in packs - ANSWER-In Antarctica killer whales hunt in packs to create waves that wash seals off iceberg How to distinguish life from non living entities? - ANSWER-abiotic factors (non living environmental components) The first major turning point in biological knowledge was - ANSWER-Neolithic (Stone Age, ≈10,000 years ago). Humans first domestica...

Biology 121- Jaymes Awbrey Exam 4/Final Questions with Verified Answers ____ by far outnumber all other animals combined? - ANSWER-Type of arthropod: Insects What are millipedes and centipedes? - ANSWER-Type of arthropod: segmented bodies jointed appendages land dwelling ____ belong to the chordate phylum? - ANSWER-vertebrates What are the four features all chordates are recognized by? - ANSWER-tail notochord pharyngeal slits hollow nerve cord Most chordates are ____...

Biology 121 Final Exam Review Questions with Complete Solutions Nitrogen is more electronegative than hydrogen. Which of the following is a correct statement about the atoms in ammonia? - ANSWER-Each hydrogen atom has a partial positive charge; the nitrogen atom has a partial negative charge. Bonds between two atoms that are equally electronegative are _______. - ANSWER-nonpolar covalent bonds Why are hydrocarbons insoluble in water? - ANSWER-The majority of their bonds are nonpolar...

Biology 121 Final Exam Questions with Correct Answers What are greenhouse gases and why have they risen? How do greenhouse gases relate to the carbon cycle? - ANSWER-Carbon dioxide, methane, and halocarbons are greenhouse gases that absorb a wide range of energy—including infrared energy (heat) emitted by the Earth—and then re-emit it. Carbon dioxide is an important greenhouse gas, because it helps Earth's atmosphere to retain heat generated from the Sun. Why is ground-level ozone...

Biology 121 Final Exam Questions with Complete Solutions A molecule is part of an atom. True or False? - ANSWER-False In a non-polar bond some atoms are slightly charged. True or False? - ANSWER-False Excluding water, most of the molecules in living organisms are based on which element? - ANSWER-Carbon The organelle responsible for cellular respiration is called: - ANSWER-Mitochondria Both prokaryotic and eukaryotic cells use ribosomes to build proteins. True or False? - ANSWER-...

Biology 121 Final Exam Questions with Complete Answers What is the name of the syndrome that produces the XXY combination of sex chromosomes? - ANSWER-Klinefelter syndrome How many chromosomes would be found in the karyotype of a down syndrome female who also suffered from Turner syndrome? - ANSWER-46 Go over the ration for offspring - ANSWER-2 milk chocolate to 2 dark chocolate What three process ensure that you are not genetically the same as your brother or sister? - ANSWER-Inde...

Biology 121 Exam 3 Study Guide Questions and Answers 8. Which of the following would be found in DNA sequences but not in mRNA sequences: - ANSWER-transcription start sites 9. Point mutations may have no effect on an organism if - ANSWER-they occur in a non-coding region of DNA. one coded for by the original codon. 10. Insertions and deletions that occur in multiples of three nucleotides: - ANSWER-add or delete amino acids to/from the normal polypeptide. 11. Frameshift mutations - AN...

Biology 121 Exam 3 Review Q&A Fecundity - ANSWER-Ability to produce an abundance of offspring or new growth -> fertility mx - ANSWER-Number of daughters/ female at age x Survivorship curves - ANSWER-Graph of the proportion of a cohort still alive at each age Type 1 curve - ANSWER-Low mortality, humans Type 2 curve - ANSWER-Constant mortality, song birds Type 3 curve - ANSWER-Summarize population demographic parameters Age distributions - ANSWER-Graphical representation ...

Biology 121 Exam 2 Study Guide Questions and Answers 10. The process of splitting water to release hydrogens and electrons occurs during the _____ process. - ANSWER-light dependent 11. Carbon dioxide enters the leaf through ___. - ANSWER-stomata 12. The final electron acceptor(s) associated with photosystem I is/are: - ANSWER-NADP 13. All of the following compounds are required for photosynthesis except - ANSWER-O2 14. Besides proteins, thylakoid membranes must contain a large n...

Biology 121 Exam 2 Questions and Answers What is the main function of the central vacuole - ANSWER-increases cell surface area; stores metabolic wastes What is the main function of the cell wall - ANSWER-to structurally protect and support the cell What is the main function of the cytoskeleton - ANSWER-structurally supports and imparts shape to the cell. Moves cell and its components What is the main function of the plasmodesma - ANSWER-communication junction between adjoining cell...

Biology 121 Exam 1 Study Guide Questions and Answers What is the Origin of Species? - ANSWER-Scientific literature written in the 1800s Who wrote it? - ANSWER-Darwin What are the two most important points of this publications? - ANSWER-Natural Selection and Evolution Who was Lamarck? - ANSWER-Published theory of evolution Know basics of his theory of evolution - ANSWER-Use it or Lose it Charles Darwin - What is the theory of natural selection? - ANSWER-More individuals are pr...

Biology 121 Exam 1 Questions with Correct Answers Emergent Properties - ANSWER-at each new level, novel properties emerge, due to the interaction of parts in an increasingly complex system Domains - ANSWER-Bacteria, Archaea, Eukarya Kingdom - ANSWER-first and largest category used to classify organisms Protists - ANSWER-organisms that do not fit into kingdoms The Scientific Method - ANSWER-Observation, Hypothesis, Experiment, Data Collection, Conclusion, and Retest (if needed) ...

Biology 121 Exam 1 Questions with Complete Solutions hypothesis - ANSWER-a proposal intended to explain certain facts or observations deductive reasoning - ANSWER-predictions that can be used to test hypotheses made from inductive reasoning controlled experiments - ANSWER-designed to demonstrate effect of 1 variable by testing control groups and experimental groups that differ in only that one variable scientific theory - ANSWER-generated new hypotheses that is supported by large bod...

Biology 121 EXAM 1 Chapters 1-3 Questions and Answers Organelle - ANSWER-A membrane-enclosed structure with a specialized function within a eukaryotic cell Molecule - ANSWER-A group of two or more atoms held together by covalent bonds Reductionism - ANSWER-Reduces complex systems to simpler components that are more manageable to study emergent properties - ANSWER-A trait that appears once the smaller parts are made/combined. For example the movement of amino acids into a protein....

Biology 121 Exam 1 - CH 1-7 Questions and Answers Ionic Bond - ANSWER-A chemical bond resulting from the attraction between oppositely charged ions. Hydrogen Bond - ANSWER-A weak chemical bond formed when the slightly positive hydrogen atom of a polar covalent bond in one molecule is attracted to the slightly negative atom of a polar covalent bond in another molecule (H bonded to O or N). Van der Waals Forces - ANSWER-Weak attractions between molecules or parts of molecules that resul...

Biology 121- Chapter 8 Complete Solutions any chromosome other than a sex chromosome; have same length, shape, and centromere location; hold information about the same traits - ANSWER-autosomes member of a pair of chromosomes that differs between males and females; differences determine sex - ANSWER-sex chromosomes XX - ANSWER-female XY - ANSWER-male in butterflies, moths, birds, and certain fishes, males have 2 identical sex chromosomes, and females don't - ANSWER-... iso...

Biology 121- Chapter 7 Questions and Answers release of chemical energy from sugars - ANSWER-glycolysis glycolysis -enzymes attach a phosphate to the 2 PGAL, and transfer 2 electrons and a H+ from each PGAL to NAD+; 2 PGA and 2 NADH are the result -glycolysis yields 2 NADH, 2 ATP, and 2 pyruvate for each glucose molecule -an enzyme (hexokinase) transfers a phosphate group from ATP to glucose, forming glucose-6-phosphate (trapped inside of the cell) -enzymes transfer a phosphate group...

Biology 121 Chapter 5 Exam Questions with Correct Answers simple diffusion - ANSWER-substances move down concentration gradients accros a membrane facilitated diffusion - ANSWER-use specialized water channel proteins (Aquaporins) osmosis - ANSWER-diffusion of water across selectively permeable membranes aquaporin - ANSWER-specialized water channels isotonic - ANSWER-have equal concentrations of water and concentration of dissolved substances hypertonic - ANSWER-greater solute...