Ultimate Biology Study Guide - Questions & Answers

the thyroid hormone calcitonin inhibits the effects of vitamin d on calcium metabolism and works to lower calcium levels in the blood. true or false
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the anticodon of a particular trna molecule is the anticodon of a particular trna molecule is complementary to the corresponding mrna codon. complementary to the corresponding triplet in rrna. the part of trna that bonds to a specific amino acid. changeable, depending on the amino acid that attaches to the trna. catalytic, making the trna a ribozyme.
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a country is currently in the second stage of the demographic transition. currently the country has a birth rate of 37.9 births per 1,000 individuals and a death rate of 13.4 deaths per 1,000 individuals. which of the following changes would indicate that the country is moving from the second stage into the third stage of the demographic transition?
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In a myofibril, a thick filament is composed of pairs of _____ molecules intertwined together
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original DNA: TACTTTAATCCCAAATTTACTDNA: TACTTTAATCCCAAGTTTACTmRNA: ?amino acid: ?what type of mutation is this: ?
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How does the wild turkey or mountain pine beetle affect theirecosystem?
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Why are the differences between prokaryotic and eukaryotic translation of mRNA useful to humans?
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Which best describes how the bloom affects the ecosystem? Select all that apply.A. more food for decomposersB. less dissolved oxygen availableC. more nutrients created for the fish D.carbon dioxide production ceasesE. populations of zooplankton decreaseF. less sunlight will reach underwater plants
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what is the role of sequences of three nucleotides in the genetic code? . what is the role of sequences of three nucleotides in the genetic code? . code for one or more bases in mrna signal the end of dna synthesis code for amino acids signal the start of rna synthesis signal the start of dna synthesis
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a physical injury to the body's tissues can result from the repeated action of relatively small forces acting on tissue, and this is called: question 19 options: a) a chronic injury. b) a mechanistic injury. c) an acute injury. d) a microinjury.
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a wild-type fly (heterozygous for gray body color and red eyes) is mated with a black fly with purple eyes. the offspring are: wild-type 721 black-purple 751 gray-purple 49 black-red 45 part a what is the recombination frequency between these genes for body color and eye color?
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at the end of which week of the ovarian cycle should implantation occur (assuming there is an embryo)?
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explain how different ways of achieving photosynthesis allow plants to adapt to specific environments
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how are atp and nadph produced during the light reactions? what is an electron transport chain (etc)?
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three or more consecutive premature ventricular complexes (pvc) at a rate greater than 100 is called:
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human ecology what are three risk management strategies and their application to protect our health.
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which type of t cell is most likely to promote acute neutrophillic inflammatory responses that defend against extracellular bacteria and fungi?
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plagioclase feldspar has the chemical formula, caal2si2o8. is plagioclase feldspar a mafic or felsic silicate mineral?
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calculate the maximum sustainable yield for a population whose carrying capacity (k) is 80,000 and whose per capita rate of growth (r) is 0.2.
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the postmenstrual phase of the menstrual cycle is also called the: a preovulatory phase. b luteal phase. c follicular phase. d menses.
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an infection in which the virus is continually present in the body is referred to as multiple choice acute. balanced. determinant. persistent.
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antibiotic-producing organisms can resist the effects of the antibiotic by all except which of the following? choose one:a. they have no need to resist the effects of the antibiotic.b. they lack the target of the antibiotic.c. they secrete the antibiotic as an inactive precursor.d. they modify the drug target in their cells to prevent drug interaction.
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how would a trade-off between dispersal ability and competitive ability affect which types of species could colonize small versus large gaps in a community?
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which informaation should be included when teaching the parents of a child with autosomal dominant polycystic kidney disease
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