Exotoxins are
A) secreted and only made by Gram-positive bacteria.
B) secreted and the targets of some childhood vaccines.
C) secreted.
D) only made by Gram-positive bacteria.
E) the targets of some childhood vaccines.
Answer: A
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In a given chemical reaction, if the free energy of formation is known for all of the reactants and each of the products, the change in free energy can be calculated for the reaction
Indicate whether the statement is true or false.
Reoviruses contain ________ genomes, and their replication occurs within the host's ________
A) ssDNA / nucleus B) dsDNA / nucleus C) ssRNA / cytoplasm D) dsRNA / cytoplasm
You are a biologist on a trip to an island in the South Pacific. While there, you are allowed to collect DNA samples from a local species of tortoise that resembles a species seen on a nearby continent
If your DNA analysis also indicates the two species are highly related, you might conclude that this was an example of _______________ through ________. A. allopatric speciation; dispersal B. allopatric speciation; vicariance C. sympatric speciation; dispersal D. sympatric speciation; vicariance
Directional, light-triggered plant development is known as
A. thigmotropism. B. phototropism. C. thigmonasty. D. photomorphogenesis. E. acid-growth movement.