The first photsynthetic autotrophs used the energy of the sun to split H2O because it is not very
electronegative.
_______ Indicate whether the statement is true or false.
F, H2S
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Chromatids that are attached at the centromere are called ______ chromatids
a. mother b. daughter c. preprogrammed d. sister e. duplicated
When eukaryotic DNA undergoes replication, DNA helicase opens many sites along the DNA molecule at which DNA replication initiates. These sites are called "origins of replication." In what way does having multiple sites of replication affect the process of DNA replication?
A) It makes the process occur more quickly. B) It allows longer molecules to be generated. C) It ensures that errors in DNA replication never occur. D) It allows proteins to be generated at the same time as DNA.
While the preservation of a landscape is often intended for one particular organism, often times other species will also benefit.
Answer the following statement true (T) or false (F)
The tuberculin response is mediated by
A) memory T cells. B) mast cells. C) B lymphocytes. D) plasma cells. E) eosinophils.