Biology

\The data in the table were recorded during an investigation in which a paramecium was placed in a hypertonic salt solution.A 2-column table labeled Paramecium Contractile Vacuole Contractions has 5 rows. The first column is labeled salt concentration outside paramecium with entries very high, high, medium, low, very low. The second column is labeled contractions per minute with entries 2, 8, 15, 22, 30.Which statement correctly describes the bars on a bar graph representing the data?The graph has five bars of equal height.The bars range from tallest for very high concentration to shortest for very low concentration.The bar for very low concentration is twice the height of the bar for medium concentration.The bar for very high concentration is five times the height of the bar for very low concentration.
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match the following. 1. a phenomenon in which a one-celled organism divides by mitosis into two organisms multiple fission 2. a kind of asexual reproduction involving the growth of a new individual from part of an older organism conidia 3. the central portion of a starfish. the arms of a starfish radiate from the central disk regeneration 4. a group of organisms attached to one another after undergoing asexual reproduction from a common parent binary fission 5. organisms break into two or more parts and then each part grows into a new individual. central disk 6. a cell undergoes many mitotic divisions in the nucleus and a number of daughter cells are produced all at once protist 7. the act of propagating or establishing and growing new plants colony 8. a one- or few-celled organism with chromosomes propagation 9. a small, resistant cell that can grow into a new organism. they may be produced either by meiosis or mitosis spore 10. one-celled unicellular 11. a special kind of asexual spore found in many kinds of fungi budding
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the severe secondary osteoarthritis that follows aseptic necrosis of the femoral head is primarily due to:
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which animals can hear a sound wave that has 18,500 cycles in 0.75 seconds? check all that apply. bats moths cats humans birds fish crickets
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The cell membranes of thermophiles and hyperthermophilic bacteria typically have more to increase membrane saturated fatty acids/rigidity unsaturated fatty acids/fluidity saturated fatty acids/fluidity unsaturated fatty acids/rigidity Question 10 2 pts Which phase of growth is most vulnerable to penicillin? lag phase stationary phase exponential phase death phase
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a. DNAse footprintingb. Mobility shift assaysc. Chromatin Immunoprecipitation Assayd. All of the abovee. None of the above
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examples of human activities that can help the environment
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which of the following would tend to promote adaptive radiation
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Which cells' direct involvement are required for cell-mediated immunity?Multiple Choiceo T-cellso B-cellso bacterial cellso viral componentso neutrophils
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in humans, red-green color blindness is a recessive, x-linked disorder. if a mother with red-green color blindness gives birth to a color-blind daughter, what genotype would the father have?
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A student is comparing the two different unknowns described in the table.Unknown 1Unknown 2Consists of a protein capsid encapsulatingConsists of a semipermeable membrane encapsulatingcytoplasm and DNA nucleoidgenetic materialRequires a host cell to replicateAble to reproduce without a host cellPathogenic to humansPathogenic to cellsWhich conclusion is best supported by the information, and which piece of evidence supports the conclusion?xxA Conclusion: Unknown 1 is a fungus, while Unknown 2 is a bacterial cell.Evidence: The conclusion is supported by Unknown 1 needing a host cell to replicate, andUnknown 2 being a living cell with a nucleoid.BCConclusion: Unknown 1 is a virus, while Unknown 2 is a bacterial cell.Evidence: The conclusion is supported because both unknowns are pathogens, and all virusesand bacteria are pathogenic to humans.Q SearchConclusion: Unknown 1 is a bacterial cell, while Unknown 2 is a fungus.Evidence: The conclusion is supported because both unknowns are pathogens, and all bacteriaand fungi are pathogenic to humans.D Conclusion: Unknown 1 is a virus, while Unknown 2 is a bacterial cell.Evidence: The conclusion is supported by Unknown 1 needing a host cell to replicate, andUnknown 2 being a living cell with a nucleold.
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what happens to the partial pressure of carbon dioxide in the blood during rapid breathing?
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what passes through atp synthase in order to turn adp p into atp?
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Coral reefsa. Tend to occur outside the tropicsb. Require water that has very low salinityc. Are made by animals that feed on algaed. Need to be at least 200 feet below the oceans surface
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with the help of some data and calculations, explain why nitrous oxide gas is considered a greenhouse gas
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if one focus is 10cm away from another, and both foci rest on the ellipse, what is the eccentricity of the ellipse?
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You synthesized Nylon-10,6, using interfacial polymerization. Draw a representation of what your experiment looked like. Clearly label the contents and identity of each layer.
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serological analysis for bacterial identification typically involves using
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Would a GWAS identify non-inherited genetic contributions to a particular trait (e.g. mutations that occur in somatic tissues, which lead to cancer for instance)? Explain.
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Use the following information to answer the questions below.Suppose an experimenter becomes proficient with a technique that allows her to move DNA sequences within a prokaryotic genome.If she moves the repressor gene (lac I), along with its promoter, to a position at some several thousand base pairs away from its normal position, which will you expect to occur?
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The reaction in which the growing chain from the tRNA in the P site covalently joins the chain to the tRNA in the A site is catalyzed by which of the following enzymes?a) Gyraseb) Topoisomerasec) Peptidyl transferased) Aminoacyl - tRNA synthetasee) Ligase
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select the statements that accurately describe epigenetic carcinogens.- include hormones that promote tumor growth - do not interact directly with DNA molecules to alter genes- interact directly with DNA molecules to alter genes - can lead to gene repression - commonly referred to as genotoxic carcinogens
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Part C- Crossing over and genetic variation Assume that an organism exists in which crossing over does not occur, but that all other processes associated with meiosis occur normally. Consider how the absence of crossing over would affect the outcome of a single meiotic event Which of the following statements would be true if crossing over did not occur Select all that apply View Available Hint(s) Independent assortment of chromosomes would not occur. The two sister chromatids of each replicated chromosome would no longer be identical. The two daughter cells produced in meiosis I would be identical The four daughter cells produced in meiosis Il would all be different. There would be less genetic variation among gametes. The daughter cells of meiosis I would be diploid, but the daughter cells of meiosis Il would be haploid
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a dihybrid cross involved a parental generation consisting of true-breeding plants with yellow, round seeds and true-breeding plants with green, wrinkled seeds. all the f1 generation consisted of plants with yellow, rounds seeds. if an f1 plant was crossed to a plant with green, wrinkled seeds, what would have been the predicted ratio of f2 seeds in the following phenotypic categories: yellow and round, yellow and wrinkled, green and round, and green and wrinkled?
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