Bio 250 straighterline test 1 prep Correct Answered Questions| Already Graded A+

Organisms called parasites are ______. Select one: a. always harmful to their host b. the decomposers in ecosystems c. always viruses d. free-living : always harmful to their host Trees of life that illustrate the phylogenetic relationships of all organisms were traditionally based on ______; newer methods for determining phylogeny rely on ______. Select one: a. morphology; nucleic acid sequences b. nucleic acid sequences; morphology c. morphology; virology d. morphology; nutritional requirements e. nucleic acid sequences; microbiomes : a. morphology; nucleic acid sequences 2 What is the maximum number of electrons in the first energy shell of an atom? Select one: a. 2 b. 4 c. 8 d. 18 e. 32 : a. 2 Which of the following is not true about enzymes? Select one: a. Enzymes are found in all cells. b. Enzymes are catalysts. c. Enzymes participate in the cell's chemical reactions. d. Enzymes can be denaturated by heat and other agents. e. Enzymes have high-energy bonds between phosphates : Enzymes have high-energy bonds between phosphates NASA has published a list of criteria for identifying fossil bacteria in samples from Mars, as part of a search for evidence of life. Which of the following is good evidence for the presence of bacterial cells? Select one: a. Cell size of 0.5 to 2 microns 3 b. Three-dimensional organization of cells in a starburst pattern c. Absence of carbon in the material d. No evidence of water in the surrounding mineral : a. Cell size of 0.5 to 2 microns Which type of medium would be the best choice when shipping a sample of bacteria from a clinic to a laboratory for testing? Select one: a. Transport medium b. Eosin-methylene blue agar c. Blood agar d. Thioglycolate medium : a. Transport mediu