ECONOMICS,NURSING,BIOLOGY AND ALL REVISION MATERIALS

AP Bio Unit 1-5 Test MCQ Questions and Answers The process depicted in the image below is best summarized by which of the following descriptions? (Note That chiasma - plural chiasmata - is the site of crossing over. ) A. During the synthesis phase of the cell cycle, DNA molecules replicate to generate identical daughter cells. B. Centromeres align specific gene sequences of homologous chromosomes during mitotic divisions. C. The spindle apparatus attaches at chiasma during metaphase o...

Pre AP Biology Final Exam Study Guide Questions and Answers Marine - ANSWERS -Like lakes, ocean zones distinguished by: Light penetration (photic/aphotic). Distance from shore/ H2O depth (intertidal/neritic/oceanic). Open water or bottom (pelagic/benthic/abyssal) Estuary/Wetlands - ANSWERS -H2O saturated soil and standing water occasionally via floods or all the time & w/ plants adapted to low O2 concentrations. Chemical: shallow w/ low O2 soil and H2O due to high rate of decomposition (...

AP Biology first semester final exam review questions and answers What was the Meselson and Stahl's experiment and what did its results look like? - ANSWERS -Meselson and Stahl tested the hypothesis of DNA replication. They cultured bacteria in a 15N medium. 15N is a heavy isotope of nitrogen so the DNA synthesized is of heavy density. They then shifted the bacteria to a 14N medium, DNA was isolated at different times corresponding to replication cycles 0, 1, and 2. After one replication...

AP Biology Multiple Choice Exam Questions and Answers Which of the following statements most directly supports the claim that different species of organisms use different metabolic strategies to meet their energy requirements for growth, reproduction, and homeostasis? A) During cold periods pond-dwelling animals can increase the number of unsaturated fatty acids in their cell membranes while some plants make antifreeze proteins to prevent ice crystal formation in tissues B) Bacteria lack ...

AP Bio 2020 Practice Exam 3 MCQ Questions and Answers Which of the following best explains the advantage these projections provide the cell? - ANSWERS -The projections increase the surface area-to-volume ratio of the cell, which allows for more efficient nutrient exchange with the environment. Figure 1. Diagram of the electron transport chain and ATPATP synthase in the membrane of mitochondria On average, more ATP can be produced from an NADH molecule than can be produced from a molec...

AP Biology Exam Questions and Answers It is estimated that oxygen production first evolved in photosynthetic prokaryotes approximately 2.7 billion years ago. The first photosynthetic prokaryotes are presumed to be similar to today's cyanobacteria. Which of the following best supports the claim that photosynthetic prokaryotes were responsible for the oxygen in Earth's atmosphere? (A) The light reactions of photosynthesis split carbon dioxide into carbon and oxygen. (B) The light ...

AP Bio Exam Practice Questions and Answers Many species of corals are threatened by the increasing temperatures and decreasing pH of ocean waters. One species, Stylophora pistillata, has been found to thrive in water that is warmer and has a lower pH than the water that corals typically thrive in. Additionally, researchers have found that the tolerance for the new water conditions is heritable. Which of the following statements best explains the changes seen in S. pistillata in response to ...

AP BIO FINAL EXAM QUESTIONS AND ANSWERS What is coevolution? - ANSWERS -the evolution of one population driving the evolution of another Select the BEST example of batesian mimicry: - ANSWERS -a hawk moth whose wings, when spread, look like the eyes of a snake How do willow trees prepare an environment for the next stage of succession? - ANSWERS -increase the nitrogen content of the soil On average, how much energy is transferred from one trophic level to the next? - ANSWERS -10% ...

Ultimate AP Biology Vocabulary Review Exam Questions and Answers diacylglycerol (DAG) - ANSWERS -A second messenger produced by the cleavage of a certain kind of phospholipid in the plasma membrane. topoisomerase - ANSWERS -Enzyme that functions in DNA replication, helping to relieve strain in the double helix ahead of the replication fork. chromatin - ANSWERS -The complex of DNA and proteins that makes up a eukaryotic chromosome. totipotent - ANSWERS -Stem cells with the potential...

ap bio exam review units 1-6 questions and answers biotechnology - ANSWERS -manipulating organisms or their components to make products restriction enzymes - ANSWERS -cut DNA at restriction sites PCR - ANSWERS -amplifies a particular piece of DNA gel electrophoresis - ANSWERS -separates macromolecules restriction fragment length polymorphisms (RFLPs) - ANSWERS -result from small differences in DNA sequences most common elements - ANSWERS -C, H, O, N protons - ANSWERS -posi...

AP Biology Practice Exam Questions and Answers signal from the gonads - ANSWERS -is required to develop into a male oxygen - ANSWERS -there was no free _____ in ancient earths atmosophere apoptosis - ANSWERS -is programmed cell death, not cell division plant on water has stomates on top because thats only place where gas exchange can occur - ANSWERS -where are stomates located on water plants and why yes - ANSWERS -is testosterone lipid soluble testosterone - ANSWERS -readily...

AP Bio Semester Final Review Exam Questions and Answers cooperative interactions between termites and the protoza allow termites to extract energy from wood to survive - ANSWERS -A colony of termites was exposed to an atmosphere of 100% oxygen for 3 days. The insects were not immediately harmed by the treatment, but the protoza that lived in the termites' guts were eliminated . The treated termites continued to behave normally and to eat wood, but they began to starve after a short time....

AP Biology AP Exam Review Questions and Answers Agonistic Behavior - ANSWERS -aggression originates from competition for food, mates, and territory Dominance Hierarchies - ANSWERS -indicate power and status relationship in a group minimize fighting Territoriality - ANSWERS -active possession and defense of territory in which animals live Altruistic Behavior - ANSWERS -unselfish behavior that reduces fitness of an individual an animal risks it safety for another animal Ways ...

AP Biology Final Exam Review Questions and Answers transpiration - ANSWERS -the emission of water vapor from the leaves of plants conservation - ANSWERS -the preservation and careful management of the environment and of natural resources introduced species - ANSWERS -nonnative species that are either intentionally or unintentionally transported to a new habitat bioremediation - ANSWERS -the use of living organisms to detoxify and restore polluted and degraded ecosystems minimum ...

AP BIOLOGY Midterm Exam Questions and Answers Which of the following processes includes all others? - ANSWERS -passive transport Cytokinesis usually, but not always, follows mitosis. If a cell completed mitosis but not cytokinesis, the result would be a cell with _____. - ANSWERS -two nuclei Which of the following statements is true regarding the molecule illustrated in Figure 5.2? - ANSWERS -it is a saturated fatty acid and a diet rich in this molecule may contribute to atheroscleros...

AP Biology Cells Exam Questions and Answers Countercurrent Exchange - ANSWERS -Diffusion of substances between two regions in which they are moving by bulk flow in oposite directions Active Transport - ANSWERS -Movement of solutes against a gradient, requiring the expenditure of energy Exocytosis - ANSWERS -Vesicles fuse with the plasma membrane and release their contents to the outside Endocytosis - ANSWERS -The plasma membrane engulfs a substance and enters the cytoplasm in a ves...

AP BIO UNIT 7 STUDY GUIDE EXAM QUESTIONS AND ANSWERS what is phylogeny and what is a phylogenic tree - ANSWERS -phylogeny: is the evolutionary history of a group of organisms. a phylogenic tree indicates decent from a common ancestor and each branch indicates a divergence from the common ancestor cladistics and a cladogram - ANSWERS -cladistics: used shared derived characteristics to classify organisms things to rememer when reading a cladogram: only use shared charactersistscs, simple ...

AP BIOLOGY UNIT 7 TEST QUESTIONS AND ANSWERS Sympatric Speciation - ANSWERS -The formation of new species in populations that live in the same geographic area Hybrid Zone - ANSWERS -a geographic region in which members of different species meet and mate, producing at least some offspring of mixed ancestry Punctuated Equilibrium - ANSWERS -Pattern of evolution in which long stable periods are interrupted by brief periods of more rapid change Catastrophism - ANSWERS -a principle that...

AP BIO Unit 6 exam review questions and answers Name two reasons that a scientist might use an Electrophoresis machine. - ANSWERS -dna analysis protien and antibody interactions Explain or draw the steps showing how pharmaceutical companies can use bacterial transformation to make human proteins (like insulin). - ANSWERS -human DNA and bacterial DNA are combined to produce insulin. Human DNA is inserted into the plasmid of bacteria. What does the word 'transgenic' literally m...

Ap biology College board Unit 2 Exam Questions and Answers The active transport pump used to move sodium ions across the membranes of fill cells in a freshwater fish has each of the following characteristic EXCEPT - ANSWERS -It uses osmosis to carry sodium ions into the cell Dialysis tubing is permeable to water molecules but not to sucrose. Four dialysis tubes are half filled with 5 percent, 10 percent, 20 percent, and 40 percent sucrose solutions, respectively, and two dialysis tubes ...