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Consider the model depicting the dynamics within a specific population of birds. Which input within this model is responsible for gene flow and therefore genetic variability within the existing bird p
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What is a Polygenic trait? Explain how a Polygenic trait, such as skin pigmentation, produces a spectrum of phenotypes.
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Telomeres are segments of DNA located at the end of chromosomes and have a loop-structure due to a long 3' overhang. Considering non homologous end joining process, can you suggest the importance of t
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Sodium is a soft, light, extremely malleable silver-white metal that reacts explosively with water. Chlorine is a highly irritating greenish-yellow gaseous halogen capable of combining with nearly all
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The bacteria species known as Escherichia coli is capable of using oxygen to produce energy in a process known as respiration. It can also produce energy if no oxygen is available by using a process c
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Scientists can alter plants such as this potato plant in order to produce bigger and better potato crops. To do this, scientists alter specific ________ found in the DNA of the plants' cells. A) RNA B
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If a 9.0-volt battery is placed across a 5.0-ohm resistance, the current will be _____ amperes.45 0.55 1.8
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A researcher is performing a test to check the effect of induce point mutation but the experimental mouse could survive what might be the reason for this
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What happens to the number of carbon atoms in the carbon chain molecules as they go through the Krebs cycle?
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Help!!!!!! which tubes will test positive for iodine and which will test positive for benedicts test?
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The following statement is false. Select the rewording that makes the statement true. A cell wall is a rigid structure that surrounds the cell membrane of animal cells.
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For many years, the rain forests throughout the world were cut down to make way for farms, roads, and new villages. The immediate result of clear cutting the forests was obvious. But this practice led
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Jenny is preparing a presentation about volume for her science class. She writes down the following notes about volume: –Volume is constant for solids since they have a shape. –Volume varies for l
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Each of these four organisms began life as a single 2N cell. Cells in each organisms divided and differentiated. Probably the single most important process that ensured genetic continuity in all four
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The parts of an organisms environment that are living or once living and interact with the organism are _____
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Which Of the following is true concerning the balance between the solar energy absorbed and radiated by earth
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White-tailed deer are considered to be an overpopulated species in the central United States. Which of these events probably contributed the most to white-tailed deer exceeding their carrying capacity
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Define mirror neurons. Briefly explain how they were discovered and what researchers have linked them Mirror neurons are activated by performing an action or seeing another perform the action. They w
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In a theoretical operon, genes a, b, c, and d represent the repressor gene, the promoter sequence, the operator gene and the structural gene, but not necessarily in that order. this operon is concerne
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Write a hypothesis about the worms and lima bean plants. Be sure to answer the lab question, “How can the presence of one species benefit another in the same ecosystem?”
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Classify each of the following as being characteristic of effusion, diffusion, or both. The mixing of two or more substances Requires the presence of a small opening Net motion of a substance from an
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Compare the venn diagram of sexual. reproduction and asexual reproduction in plants. where in the diagram would you add offspring different from parents?
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Neurofibromatosis, a genetic disease caused by mutation on the NF1 gene, follows an autosomal dominant pattern of inheritance. The diagram shows that the father carries two copies of the defective gen
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An important biotic factor in this Wetland which impacts populations of all species that live in the wetlands is / are
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___________ of electromagnetic radiation is visible to the human eye. A.All B.A narrow portion C.The white color D.The dark color
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State a hypothesis in the form of an "If...then" statement that accurately reflects your beliefs about the effects each oil will have on four different substances
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is a type of cell division during which chromosomes are copied and equally distributed between two daughter cells, which are genetically identical to the parent cell.
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What is a "missing link" in the fossil record? A.) a fossil that shows a vestigial structure B.) a transitional fossil that shows how two species are connected C.) a fossil that is physically impossib
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Which statement is true? 1. Because of The Patient's Bill of Rights, parents can no longer make health-care decisions for minors. 2.The Affordable Care Act allows parents to keep their children on th
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Molecular models of the two different substances are shown below. In the molecule on the left, the oxygen atom pulls on electrons more strongly than the hydrogen atoms. In the molecule on the right, t
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Which summarizes the products of glycolysis? ATP, NADH, and pyruvic acid ATP, CO2, and pyruvic acid glucose, ATP, and NADH NAD+, NADH, and ADP
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Is the binding of a transcription factor to its dna recognition sequence necessary and sufficient for an initiation of transcription at a regulated gene?
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In what ways do ice and snow influence the storage of energy? what evidence is there that this is so?
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In nerve cells the sodium-potassium pump is used to generate gradients of both sodium and potassium ions to propagate electrical signals that travel along nerves. This is a(n) A)
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Using microscope slides and dipping them into the boiling hot springs at Yellowstone National Park, scientists were able to collect these organisms. They are unicellular, prokaryotes with a cell wall.
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Brass gets discoloured in air because of the presence of which of the following gases in air? A. Oxygen B. Hydrogen sulphide C. Carbon dioxide D. Nitrogen
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This photograph was taken at a location on Mount Saint Helens called Meta Lake. The area was clear-cut before the volcano erupted in 1980, meaning that all trees were cut down and used for timber or o
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How might stem cells most likely be used in the future to treat human disease? A. Stem cells could be modified to produce chemicals that kill bacteria and viruses. B. Stem cells could be used to preve
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The thylacine is an extinct marsupial that once roamed Tasmania and Australia. There are several preserved specimens in existence. Which of the following DNA technologies offers the best chance for br
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Johannes Kepler was a German astronomer who lived in the 17th century. He was the first scientist to accurately describe the motions of the planets around the Sun with mathematics. More than 50 years
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Identify the correct sequence of molecules, as a gene goes from coded information in the nucleus, to the product the cell wants to make. A) DNA -> messenger RNA -> transfer RNA -> protein B) DNA -> tr
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Which of the following describes an example of an energy resource that does not pollute the air with greenhouse gases? a)Wind power, which converts wind to electrical energy b)Natural gas, which is re
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How does the soil-based view of the phosphorus cycle compare/contrast with the global-view of the phosphorus cycle?
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An animals body works to maintain its body temperature at a constant level , even when the surrounding temperature changes. What type of feed back does this show?
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An individual has a nutrient deficiency due to a poor diet and is missing a specific amino acid, how would this affect the ability of the cell to synthesize particular proteins?
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Diseases can be caused by inherited disorders, exposure to toxic substances, organ malfunction and certain personal behaviors. Choose two of the above and for each one give a specific example of an as
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What is the correct term for variation in characteristics within populations of the same species? A variation in characteristics within populations of the same species is called .
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What's the number of photosynthetic organisms on the earth decreased drastically which would happen as a result
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You want to isolate a functional integral membrane protein from the cell to study its channel activity. what method would you use to isolate the integral membrane protein? by using mild-detergent by a
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A negative impact of a large, hydroelectric dam is that it backs up water sometimes for miles behind it, destroying natural habitat that once was there. But a positive environmental impact of a dam is
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