In a population that is following a logistic growth pattern, what shape does the population's growth curve most closely resemble?
A) S
B) J
C) ?
D) ?
A
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You have developed a new drug and have been asked to test the drug's mutagenicity before putting it on the market. Which test could you use to determine your compound's mutagenic potential?
What will be an ideal response?
Why might eating high on the food chain subject humans to higher concentrations of certain toxic substances than eating low on the food chain?
What will be an ideal response?
To crack the genetic code, researchers introduced synthetic messenger RNAs into in vitro translation systems and determined which proteins were produced from these synthetic mRNAs. mRNAs consisting of poly-UUC led to production of three different proteins: poly-Phe, poly-Ser, and poly-Leu. What best explains this result?
A. Each codon codes for several different amino acids. B. Each amino acid is specified by several codons. C. Transcription started at three different places. D. The synthetic mRNA was read in all three reading frames.
The health care professional bases her responses to Katrina’s questions about leukemia on the fact that leukemia is a/an:
a. hereditary form of hemolytic anemia in which the alpha or beta hemoglobin chains are defective and the production of hemoglobin is deficient, creating hypochromic microcytic RBCs b. malignant plasma cell neoplasm causing an increase in the number of both mature and immature plasma cells, which often entirely replace the bone marrow and destroy the skeletal structure. c. excessive uncontrolled increase of immature WBCs in the blood, eventually leading to infection, anemia, anddecreasing numbers of platelets. d. abnormal increase in the number of RBCs, granulocytes, and thrombocytes, leading to an increase in the volume and viscosity of the blood.