Biology

Which of the following types of solutions should be used when preparing a wet mount? (Circle one.) a. hypertonic b.hypotonic c.isotonic
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Which of the following processes releases carbon dioxide into theatmosphere?
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Translation of the DNA sequence AAGCTGGGA would result in
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Which of these is a benefit of GMOs?A) decreased need for harmfulpesticidesB) decreased nutritional valueC) helpful to all farmers
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Please help: Which process in plant physiology could not occur if the opening of the undersides leaves are closed?A)photosynthesisB)phototropismC)reproductionD)respiration
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Which options correctly describe a biological change caused by introducing the kudzu vine into the southeastern United States?Select all that apply.populations of small animals decreased, and populations of large animals increasednative animal populations decreasednative plant populations decreasedtree species increased while small plant species decreased
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Use the terms in the answers below to fill in the blanks in the following sentences. "An investigator is studying mutants in methionine synthesis. The _________ mutants are unable to ATP sulfurylase, also known as ______. This protein is the product of the _________ gene. "
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When the energy flow through an ecosystem is measured at each trophic level, approximately __________ of the available energy passes from one level to the next.
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How many of the known minerals found in the Earth's crust are impure? (mixed with something else)a) None of themb) All of them
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"In order to determine if the amygdala is needed for rats to learn to avoid an electric shock, Kevin plans to inject a neurotoxin into the amygdala. Which technique is Kevin using?
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A hypothetical endangered species of wildflower has been reduced to a single small population in a mountain meadow. A rare early spring blizzard kills all but 3 of the remaining plants, one of which has a rare mutation. This is an example of:A.genetic drift (bottleneck).B.disruptive selection.C.natural selection.D.stabilizing selection.E.gene flow.
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Two populations of birds with somewhat different coloration live on opposite sides of a peninsula. The habitat between the populations is not suitable for these birds. When birds from the two populations are brought together, they produce young whose appearance is intermediate between the two parents. These offspring will breed with each other or with birds from either parent population, and all offspring of these pairings appear intermediate to various degrees.What keeps the two populations separate?A. temporal reproductive isolation B. lack of hybrid viability C. behavioral reproductive isolation D. spatial reproductive isolation
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Histone methyltransferases are a class of enzymes that methylate certain amino acid sequences in histone proteins. A research team found that transcription of gene R decreases when histone methyltransferase activity is inhibited. Which scientific claim is most consistent with these findings?
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Indicate the oxygen requirements of the microorganisms growing in each thioglycolate tube. The surface of the tube is exposed to oxygen and is aerobic. Oxygen concentration decreases with depth; the bottom of the tube is anaerobic. Drag the appropriate labels to their respective targets.
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The Km of your favorite enzyme that operates by normal Michaelis-Menten kinetics is 10-6 M. You start off with a substrate concentration of 10-3 M and an enzyme concentration of 10-9 M. kcat is 10sec-1 . After a short time you have reached steady state.a)__________ is the concentration of free enzyme.b)__________ is the concentration of the ES complex.Please provide an explanation. I am a bit confused.Answer key says answers are:a)0b) 10^-9M
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It has been suggested that scientists should attempt to genetically engineer a plant to have black leaves so that it would perform photosynthesis more efficiently. What is the likely reason behind this idea?
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Which type of thermal energy transfer causes clouds to form?Question 2 options:convectionconductionradiationfreezing
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Match each vocabulary word to the correct definition.
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organism interaction and relationship webquest
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The peripheral nervous system is involved in _____.involuntary, but not voluntary, actionsboth voluntary and involuntary actionsvoluntary, but not involuntary, actions
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endocytosis brings large particles
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How much more [H+] does lemon juice (pH 2) have compared with pure water (pH 7)? Remember that each pH unit represents a 10 fold change in the [H+].
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Scientific thinking: what clues about biology might road kill provide?
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Measles is a disease that causes fever and rash. The graph gives the number of measles cases in the United States between 1954 and 2008. The measles vaccine was introduced in the 1960s. What can you conclude using the information in the graph? a graph giving the number of measles cases in the United States between the years 1954 and 2008 shows a high around 775,000 cases in 1958 and a low of 0 cases in 2008 A. Measles is the leading cause of fevers for children under age 5 in the United States. B. Visitors who are not vaccinated continue to spread measles in the United States. C. The measles vaccine had little effect on the population of the United States. D. The measles vaccine eliminated measles in the United States.
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