What are the two types of nucleic acid?
a. mRNA and tRNA
b. mDNA and rRNA
c. DNA and RNA
d. none of the above (there is only one type of nucleic acid and it is DNA)
c
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Genes on the same chromosome are said to show ____________________. Fill in the blank(s) with the appropriate word(s)
In most plant-pollinator interactions, plants species are pollinated by
A) one animal species, and each animal species pollinates one plant species. B) one animal species, and each animal species pollinates multiple plant species. C) multiple animal species, and each animal species pollinates one plant species. D) multiple animal species, and each animal species pollinates multiple plant species.
The polymerase chain reaction requires endonuclease to cut samples of DNA.
Answer the following statement true (T) or false (F)
When might it be the case that a difference-in-differences estimator still does not identify a consistent estimate of the causal treatment effect?
A. If there are non-time varying effects that generate differences between treated and non-treated groups. B. If there are time varying effects that generate amongst both treated and non-treated groups symmetrically. C. If there are time-varying trends that are different amongst treated and non-treated groups. D. If the treatment is non-normally distributed.