Genomic DNA sequences seem to support the idea that the first eukaryotic cell arose from within the ________ lineage.
A. archaeal
B. bacterial
C. last universal common ancestor (LUCA)
D. viral
Answer: A
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What is ethylene?
a. a food source for the developing embryo b. a ripening hormone c. a substance to discourage animals from eating fruit d. a type of nectar
What is the difference between standard error of the mean (SEM) and standard deviation (SD)?
A. Standard deviation tells us about how well we can trust mean from samples. B. They are the same. C. Standard error of the mean tells us about how well we can trust mean from samples. D. Standard deviation is square of Standard error of the mean.
What compound has the highest concentration in a cell?
A. H2O B. CO2 C. NH3 D. glucose E. CH4
The molecule that can carry foreign DNA into host cells is a(n) ____
a. cloning vector b. transcriptase c. DNA ligase d. endonuclease e. DNA polymerase