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1. If A represents atomic mass and Z represents atomic number, which of the following describes an atom after a proton is emitted from its nucleus?A. A+ 1, Z + 1B. A-1, Z-1C. A+ 1, Z-1D. A-1, Z + 12. A population shows the following annual data: 3% emigration 2% immigration 2% births 1% deaths Which of the following is the change in population at the end of the year?A. 3% decreaseB. 2% increaseC. 1% decreaseD. No change3.In humans (2n =46), mitosis results in ____ and meiosis results in _____ Which of the following options correctly completes the sentence above?A. 2 cells with 23 chromosomes; 4 cells with 46 chromosomesB. 4 cells with 46 chromosomes; 2 cells with 23 chromosomesC. 2 cells with 46 chromosomes; 4 cells with 23 chromosomesD. 4 cells with 23 chromosomes; 2 cells with 46 chromosomes4. In an experiment,a reseacher counts the number of oxygen bubbles produced by water plan placed under different colors of light. The researcher find that water plants place under white light release more oxygen bubbles than water plants placed under red light. Which of the following statements s best supported based on the observation:A. Light can break up water moleculus to form oxygen.B. White light increases photosynthesis in plant.C. Red light has no affect on the release of oxygen from water plants.D. An increase in temprature decreases the amount of oxygen produced by plants.5. A scientist has note a possible relationship between a certain chemical substance found in fish and the occurrence of kidney failure in humans. Which of the f/w preliminary steps should the scientist take before conducting a controlled experiment: A. Establish a cause and effect relationship between the substance and the outcome.B. Review the literature to dertermine what other research is available on this topic.C. Write a research grant proposal to the appropriate federal funding agency.D. Distribute letters of consent to human subjects who will be used in the research.
Discuss and explain why do you think that molecular evidence often yields an earlier date for a speciation event than fossil evidence?
A form of color blindness is inherited as a recessive X-linkedtrait. A couple has a color-blind daughter and a normal son. What are the genotypes and phenotypes of the parent? What is the probability that their next two children will be color-blin..
jeff and trina collected some wildflower seeds from a medow and scattered them along the roadside near their home. As the weather got hotter, some of the seedlings began to wither.
Research online to search for food and kitchen safety tips at www.fda.gov sponsored by the U.S. Food and Drug Administration and other credible sites.
Describe each component of energy expenditure. What factors influence each? How can energy expenditure be estimated?
describe the 4 main organic molecules found in living things carbohydrates lipids proteins and nucleic acids.answers
why do my balls ooze green and blue puss when I sit on them and I get a tingly sensation and it tastes of clotted cream?
The pH at whichthe predominant form of an amino acid has a net of 0 is known asthe pI, Estimate the pI of glutamic acid
Explain three things that a paleontologist must do to plan a fossil hunting expedition so that he is likely to find evidence to reply a specific scientific question.
Eighteen museum specimens of the extinct great Auk were used to amplify coxI, a mitochondrial gene for cytochrome oxidase. DNA sequence analysis of 600 nucleotides of coxI revealed 5 alleles and the number of nucleotide differences between them are s..
In Drosophila melanogaster, a gene "ebony" produces a dark body colour when homozygous, and an independently assorting gene "black" has a similar effect (that is the black and ebony body colours are indistinguishable).
An achondroplastic male dwarf with normal vision marries a color-blind woman of normal height. The man's father was six-feet tall, and both the woman's parents were of average height. Achondroplastic dwarfism is autosomal dominant, and red-green c..
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