The evolutionary ancestors of mitochondria are believed to have been ancient ____
a. Archaea
b. cyanobacteria
c. proteobacteria
d. green bacteria
e. Gram-positive bacteria
ANSWER: c
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Which of the following is a desirable general characteristic of antimicrobial drugs?
A. Broad-spectrum of activity B. Bactericidal rather than bacteriostatic C. Selective toxicity D. All of the choices are correct.
How was it determined that X rays are mutagenic?
What will be an ideal response?
The chorion is the extraembryonic membrane closest to the embryo proper
____________________ Indicate whether the statement is true or false.
Each nephron of the kidney consists of a long tubule and associated small blood vessels. Blood cells and plasma proteins are too large to enter with the glomerular filtrate. What is the correct path for the filtrate to follow through the nephron in the production of urine?
A. Bowman's capsule ? collecting duct ? proximal convoluted tubule ? loop of Henle ? distal convoluted tubule B. Bowman's capsule ? distal convoluted tubule ? loop of Henle ? proximal convoluted tubule ? collecting duct C. Bowman's capsule ? loop of Henle ? proximal convoluted tubule ? distal convoluted tubule ? collecting duct D. Bowman's capsule ? proximal convoluted tubule ? loop of Henle ? distal convoluted tubule ? collecting duct E. collecting duct ? proximal convoluted tubule ? loop of Henle ? distal convoluted tubule? Bowman's capsule