Sequencing technology and molecular phylogenetic analyses have had very little impact on our understanding of the evolution and diversity of life on Earth
Indicate whether the statement is true or false.
Answer: FALSE
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For the process of diffusion to occur, molecules must
A. move from areas of high concentration to areas of lesser concentration until an equilibrium is reached. B. move from areas of low concentration to areas of higher concentration until an equilibrium is reached. C. remain stationary until their molecular motion allows for an equilibrium to be reached. D. move from areas of high concentration to areas of lesser concentration until facilitated transport can assist the molecular equilibrium. E. move from areas of high concentration to areas of lesser concentration until an equilibrium is reached by active transport.
A Punnett square is used to determine
(a) probable gamete genotypes. (b) possible parental phenotypes. (c) possible parental genotypes. (d) possible genetic outcomes of a cross.
Patients are instructed to collect sputum specimens in such a way as to minimize contamination with normal microbiota from the mouth. A sputum specimen has arrived in the clinical laboratory and a Gram-stained smear of the specimen reveals a mixture of Gram-positive cocci, Gram-negative cocci, and Gram-positive bacilli as well as numerous squamous epithelial cells.This result indicates
A. a poor quality specimen of primarily saliva and oropharyngeal microbiota. B. that the specimen has been properly collected and is representative of sputum. C. that the patient has bacterial pneumonia rather than viral pneumonia. D. that the patient has a pneumonia caused by a mixture of different bacteria.
Which kingdom includes only multicellular heterotrophs?
a. protists b. archaebacteria c. plant d. animal