Biology

DNA replication involves producing new copies of DNA molecules. How many individual DNA strands exist after one molecule of DNA has been replicated? A. 3 B. 4 C. 2 D. 1
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During the Carboniferous period, forests consisting mainly of produced vast quantities of organic matter, which was buried and later became coal. A) giant woody mosses C) ferns and other seedless plants B) gymnosperms D) angiosperms
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The following table describes several molecules and their functions. The molecules all belong to the same class.MoleculeFunctionOleic acid used for energy storage and insulation in whalesPhospholipid component of cell membranes in plants and animalsBrassinosteroid steroid hormone involved in pollen elongation in plantsWhich class of biomolecule do the molecules in the table belong to?A. lipidsB. proteinsC.nucleic acidsD.carbohydratesResetNext
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Enzymes are proteins that change energy-requiring reactions to energy-releasing reactions. true or false
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When the neuron is at rest, what is primarily responsible for moving potassium ions OUT of the cell?
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in the reaction below how would adding more of product C affect the equilibrium of the system? A+B arrows both ways C+DIn the endothermic reaction below how would adding hear affect the equilibrium of the system? A+B + energy arrows both ways +DIn the following reaction, if you wanted to produce more hydrochloric acid (HCl2), what would you do? 4HCl + O2 arrows both ways 2H2O + Cl2
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The process of using any of the five senses to gain information about an environment or about a problem.
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What is true about elements and compounds? A. Elements contain two or more compounds. B. Compounds contain two or more elements. C. Compounds contain atoms; elements do not. D. Elements contain atoms; compounds do not
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When warm air rises, air pressureA. decreasesB. stays the sameC. increasesD. temperature doesn't impact air pressure
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Nicole and Camille are synchronized swimmers for their college swim team. They often work long hours to ensure the movements in their routine are perfectly timed. What part of their brains must Camille and Nicole rely on most?
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In what type of psychosurgery is a device like a pacemaker implanted into a part of the brain to send electrical impulses to that area of the brain? It is used primarily for Parkinson's disease, and major depression, although it can be used for a number of other disorders as well.
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In Drosophila melanogaster, ebony body color is determined by the e allele. The e' allele produces the wild type honey-colored body. In heterozygotes for the two alleles, a dark marking called the trident can be seen on the thorax, but otherwise, the body is honey-colored. The e' allele is thus considered to be incompletely dominant to the eallele. When female e' e' flies are crossed to male e' eflies, what is the probability that progeny will have the trident marking? Animals with the marking mate among themselves. Of 300 progeny, how many would be expected to have a trident, how many would have ebony bodies, and how many would have honey-colored bodies?
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Devise a scheme to prepare 10^-6 dilution on a plate using the least number of sterile water dilution tubes.
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The starting cell must duplicate its Chromosomes in interphase before mitosis can being? Does this change the number of chromosomes? Chromatids? both? how many of each would you expect in a human cell after interphase
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how does meiosis contribute to genetic variation, while mitosis does not?
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What are the functions of lipids?
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The resurrection fern (Pleopeltis polypodioides) grows on the bark of southern live oak trees (Quercus virginiana). Resurrection ferns that grow on the underside of branches receive less water than those growing on the topside and, therefore, have a fitness of only 0.28. How many of these ferns will be non-reproducing?a. 52%b. 72%c. 80%d. 28%
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Gas exchange that occurs at the level of the tissues is called. Select one: a. Pulmonary ventilation b. External respiration c. Internal respiration d. Interpulmonary respiration
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In order for ground water to enter a well, the well must be deeper than the watertable.true or false
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A demonstration is performed during a lecture on musclephysiology in which a student is asked to fully extend hisright arm with the palm up. Two large textbooks are placedon his palm, one at a time. Which of the following facilitatesthe maximum amount of tension that allows the student tokeep his arm extended in place under the increasing weight ofthe books?(A) Amount of Ca2+ released from the sarcoplasmic reticulum(B) Amount of muscle phosphocreatine(C) Amplitude of the action potential(D) Number of motor units recruited(E) Rate of cross-bridge recycling
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In the Great Lakes, there are over 3,500 types of organisms that cannot produce offspring with each other. All of these different types of organisms create a wide variety of wildlife.Which type of biodiversity does this example describe?Aecosystem diversityBgenetic biodiversityCnutrient biodiversityDspecies biodiversity
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DNA from a newly discovered virus was purified, and UV light absorption was followed as the molecule was slowly heated. The absorbance increase at the melting temperature was only 10%. What does this result tell you about the structure of the viral DNA? Please be sure to make your initial post and respond to at least two classmates with additional questions and comments to further the discussion.
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1 Describe 2 ways that carbon is removedfrom the atmosphere.
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What approach is required to balance the objectives of sustainable development?Balancing the objectives of sustainable development requires a(n)approach
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