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1. (TCO 4) Hadley needs to make a 10% (m/v) NaCl solution for use in an experiment.
(a) What is the solute in the resulting solution? What is the solvent in the solution? How do you know?
(b) Is this solution a strong electrolyte, a weak electrolyte, or a nonelectrolyte? Why?
(c) How many grams of NaCl are required to make 250 mL of the 10% (m/v) NaCl solution? Be sure to show your work for full credit.
(d) What volume (mL) of a 2% (m/v) NaCl solution can be prepared by diluting 100 mL of a 10% (m/v) NaCl solution? Be sure to show your work for full credit.
2. (TCO 9) A gray fruit fly with red eyes is crossed with an ebony fruit fly that has orange eyes. All the offspring are gray and have red eyes. (a) What are the genotypes of the parents and the F1 offspring? Be sure to define the symbols you use for each pair of genes. (b) If two of these F1 fruit flies are crossed, what phenotypes do you expect in the offspring? In what ratio? (c) Which of Mendel's laws is demonstrated here?
What is the most likely explanation for the segregation of wild-type and mutant mice in the F2? Are the naked and hairless mutations alleles for the same gene?
Cystic fibrosis is a chronic lung and digestive disease caused by a mutation in the CFTR gene on chromosome 7. In the United States approximately 39 in 10,000 individuals are affected.
Briefly describe three specific aspects of transpiration and phloem transport that involve active transport of molecules.
This organ contains chief, parietal and goblet cells. This organ contains a sphincter whose malfunction can lead to heartburn
XYY humans are fertile males. XXX humans are fertile females. What do these observations reveal about the mechanisms of sex determination and dosage compensation?
he pyrimidine and purine bases are nitrogen containing compounds. What is the source of nitrogen for these two ring systems? In most examples,
Tetrodotoxin is a poison found in pufferfish and some other animals. most cases of human tetrodotoxin poisoning occur when a person eats cooked or uncooked pufferfish.
Kevin's father has been advised by his physician to take an aspirin a day "to reduce his risk of heart attack." What is the physiological basis for this advice?
When is the best time for a woman to get pregnant; right before or after menses? What role does temperature have on fertilization
Studies have demonstrate that the effect of neuropeptide Y on smooth muscle cells in the uterus is attenuated doing pregancy.
A typical prokaryotic cell has about 3,000 genes in its DNA, while a human cell has about 20,500 genes. About 1,000 of these genes are present in both types of cells. Explain how such different organisms could have this same subset of genes ?
Describe the major points of the Sternberg, Spearman, and Gardner models of intelligence. Discuss specific similarities and differences from one model to another. Discuss which model appears to be the most comprehensive model of intellectual function..
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