you test a strain of bacteria, strain x with an antibiotic and all of the bacteria are killed. overnight there is an accident and your bacteria strain is
mixed with another strain, strain y, known to be antibiotic resistant. you separate them out again and perform the same antibiotic test on strain
x again, but this time a few survive. what probably happened?
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a. bacteria can't transfer anything to each other, it was a coincidence.
b. mixing with the other strain dissolved the capsule on some of the bacteria, allowing them to survive.
c. when they mixed, some of the bacteria from strain x obtained plasmids from strain y, these plasmids gave them dna that allowed
them to resist the antibiotic.
d. some of the bacteria from strain x engulfed the strain y bacteria, taking their resistance to antibiotics
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Liquid water turns into water vapor at which step in the water cycle? a. precipitation o b. water run off c. evaporation d. condensation

Select the best answer for the question, ly 12. which of the following behaviors is not an inherited behavior?

Mouse liver cells were homogenized and the homogenate subjected to equilibrium density-gradient centrifugation with sucrose gradients. fractions obtained from these gradients were assayed for marker molecules (i.e., molecules that are limited to specific organelles). the results of these assays are shown in the figure. the marker molecules have the following functions: cytochrome oxidase is an enzyme involved in the process by which atp is formed in the complete aerobic degradation of glucose or fatty acids; ribosomal rna forms part of the protein-synthesizing ribosomes; catalase catalyzes decomposition of hydrogen peroxide; acid phosphatase hydrolysis monophosphoric esters at acid ph; cytidylyltransferase is involved in phospholipid biosynthesis; and amino acid permease aids in transport of amino acids across membranes. a) name the marker molecule and give the number of the fraction that is most enriched for each of the following cell components: lysosomes; peroxisomes; mitochondria; plasma membrane; rough endoplasmic reticulum; smooth endoplasmic reticulum.