Which respiratory structure likely has the largest surface area for gas exchange to occur?
A) the body surface of a worm
B) the lungs of a pig
C) the tracheal system of a house fly
D) the gills of a trout
Answer: B
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The order Lactobacillales within Firmicutes are also called the lactic acid bacteria, because these bacteria
A) can aerobically catabolize lactic acid. B) can ferment lactate. C) produce lactate. D) uniquely require lactic acid as a precursor for cell wall biosynthesis.
What second messenger is directly involved in activating protein kinase C (PKC)?
A. G protein B. Phospholipase C C. cGMP D. DAG E. cAMP
A heterozygote could have a variety of phenotypes depending on whether or not the mutation is recessive, dominant, or haploinsufficient. In this example, the gene A is necessary to form a tail in mice. If the mouse is a heterozygote (A/a), then what
would you predict the phenotype to be if the mutation was recessive, dominant, or haploinsufficient. What will be an ideal response?
In the four body plan cross sections shown on the last two slides, what major omission has been made for all four animal phyla?
A. heart B. fur C. nervous system D. A and B E. A and C F. B and C G. A, B and C