Biology

When should you refuse to accept food in a shipment?When there are dented cansWhen the food is too expensiveWhen there are no packing slipsWhen the shipment is delivered late
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Researchers investigating the regulation of neurotransmitter release from presynaptic neurons proposed a model in which CDK5, a protein expressed in axon terminals, inhibits the movement of synaptic vesicles to the presynaptic membrane... to test their model, the researchers used a modified version of green fluorescent protein...based on the model, which of the following best explains why a bright green fluorescence was observed following stimulation of a presynaptic neuron?
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Which statements about viruses are true? Select all that apply. A. Viruses are ultramicroscopic cells. B. Viruses are infectious particles with a protein coat surrounding the nucleic acid. C. Bacteriophages are viruses that can also infect the animal cells infected by the bacteria. D. Viruses are nonliving. E. Viruses are not living.
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You are responding to a call where an 8-year-old has been stung by a wasp. His skin is pale with patches of raised red spots on his hands, arms, and face. These spots are most likely what? A) Angioedema B) Acne C) Urticaria D) A fungal infection
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Pointing your toes like a ballerina is an example of plantar flexion.A.TrueB.False
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Examine the results of an experiment above discussing how temperature affects cellular respiration. Identify the temperature at which oxygen levels would be predictably lowest and explain why.
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What happens when consumers eat producers in the energy pyramid? A Energy transfer forms from the producer to the consumer. B energy transfers from consumer to producer C energy transfers from the producer to predator D energy transfers from the consumer to the producer
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Which statements are true for a protein whose genetic sequence has 11 codons?Select all that apply.1.) It starts with an arginine amino acid.2.)One start codon and one stop codon are used for its synthesis.3.)The piece of genetic code used for its production contains 11 codons.4.)The stop codon codes for methionine.WILL MARK YOU BRAINLIEST
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If you could hsow the steps and walk me through it that would be very appreciated!! Among a particular population of 100 plants, red flowers are dominant and yellow flowers are recessive. F is the dominant allele and f is the recessive allele.40 plants are homozygous dominant44 plants are heterozygous16 plants are homozygous recessiveUse the Hardy-Weinberg equation to calculate the equilibrium frequencies of each genotype.
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Samira watched a demonstration in which a scientist combined two substances in a sealed container and analyzed the results. The ending substances did not look the same as the starting substances. Samira was given a diagram with the repeating groups of atoms that make up the starting substances, plus information about the properties of the starting and ending substances. She created a model of the repeating groups of atoms that might make up the two ending substances. Does her model correctly show why the properties of the ending substances are different from the properties of the starting substances? Describe what could be correct or incorrect about her model.
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Sickle-cell anemia results from a point mutation in the HBB gene. The mutation results in the replacement of an amino acid that has a hydrophilic R-group with an amino acid that has a hydrophobic R-group on the exterior of the hemoglobin protein. Such a mutation would most likely result in altered ______.
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Discuss the potential effect on the biosphere if diatoms were prevented from storing their food as oil.
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A double-stranded DNA molecule is separated into its constituent strands, and the strands are separated in an ultracentrifuge. In one of the strands the base composition is 22% A, 30% T, 20% G, and 28% C. What is the base composition of the other strand?
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Which statement is true?A cell generates order by decreasing the entropy of its surroundings.A. A cell takes in heat from the environment to power its biosynthetic reactions, thus obeying the second law of thermodynamics.B. Cells obey the first law of thermodynamics, but are exempt from the second law.C. The breakdown of food molecules generates heat, which cells then use to drive the synthesis of large molecules.D. The heat released by an animal cell comes from the chemical-bond energy present in the food molecules it metabolizes.
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Which two events occur when gravity causes a nebula to collapse into itself? A. Nuclear fusion starts. B. The nebula cools down. C. A supergiant forms. D. A new star forms.
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Most protists are unicellular microscopic organisms including amoebas and diatoms. Why are organisms like this so important for ocean environments ?
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You hear on the news that a volcano erupted in thePacific Northwest. You did not hear all the details, butthe reporter mentioned it was one of the most explosiveeruptions in the history of the United States. Thebroadcast shows a massive cloud of smoke and ashtowering above a large volcano with steep sides.Based on the evidence presented in the broadcast, whattype of volcano is most likely responsible for theeruption?Acinder coneBcompositeCshield
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A large population of laboratory animals has been allowed to breed randomly for a number of generations. After several generations, 25% of the animals display a recessive trait (aa), the same percentage as at the beginning of the breeding program. The rest of the animals show the dominant phenotype, with heterozygotes indistinguishable from the homozygous dominants.What is the estimated frequency of allele A in the gene pool? A) 0.25 B) 0.50 C) 0.75
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Analyze the Rate of Radioactive DecaySuppose you could watch radioactive atoms decay. It would probably get quite boring as time went by.Why? Check all that apply.The initial decay rate is very fast, but the decay rate decreases over time.Due to randomness, the last couple of radioactive atoms may take a long time before they becomenonradioactive.The pattern becomes very predictable.Only a few radioactive nuclei are left to decay, so fewer and fewer atoms decay.The rate of the decay decreases with each half-life cycle.The probability that an atom will decay is reduced with each half-life cycle.
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Translation in prokaryotes occurs in the ___________. Translation in eukaryotes occurs in the ___________. bio 172
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DNA can be visualized as a ladder in which the parallel rungs ("steps") would be _____.
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We are trying to determine the possible modes of inheritance for some particular human disorder. We have a very small pedigree for this disorder. Assuming the pedigree is accurate, indicate which of the six modes of inheritance are consistent with this pedigree: Select one or more: X-Linked Recessive
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Fish must have oxygen in the water to survive. How would a decrease in oxygen affect the fish in the aquarium? The variety of fish would increase. The number of fish would decrease. The number of fish would increase. The variety of fish would decrease.
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Which of Mendel's postulates can only be demonstrated in crosses involving at least two pairs of traits?
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