In what way do phospholipids differ from normal lipids called triglycerides? a.  ...........................……………………………….. b. Why is this difference crucial for biofilm and membrane formations? ………………………………………………………………..

Gram-positive Catalase + Acid from ............................... Staphylococcus Glucose............................................... Micrococcus Catalase - Coccus................................................ Streptococcus Rod..................................................... Lactobacillus Gram-negative Oxidase - Acid from lactose Uses citric acid............................... Citrobacter Citric acid...................................... Escherichia Lactose - H2S produced Urease ........................ Proteus Urease ....................... Salmonella Oxidase + Rod..................................................... Pseudomonas Coccus................................................ Neisseria Use the dichotomous key in Table 2 to identify a gram-negative rod that ferments lactose and uses citric acid as its sole carbon source. Group of answer choices C) Pseudomonas

Paramecium caudatum lives in a hypotonic solution. Excess water is removed from the cell via structures called contractile vacuoles. Given what you know about vacuoles (refer to Table 3.3, p. 68) and what you know about cells able to contract, suggest the type of transport that occurs when water is moved out of Paramecium.

Biopsies from aggressive cancers often have cells that contain several nuclei per cell when viewed through a microscope. Which scenario could explain how such a multinucleated cell might have come to be? (a) The cell underwent repeated mitosis with simultaneous cytokinesis. (b) The cell had multiple S phases before it entered mitosis. (c) The cell underwent repeated mitosis, but cytokinesis did not occur. (d) The cell underwent repeated cytokinesis but no mitosis. (e) The cell actually went through meiosis and not mitosis.