What is the function of the stigma of a flower?
What will be an ideal response?
It serves as a sticky landing site for pollen.
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Deoxyribonucleotidesare included in the Sanger sequencing reaction mix to _____
a. provide a substrate forRNA polymerase b. enhance the activity of the dideoxyribonucleotides c. allow longer DNA fragments (up to 300 additional base pairs)to be sequenced d. allow the production of multiple DNA fragments of different lengths e. prevent the DNA polymerase from making too many errors
Answer the question using the accompanying figure. Neurotransmitters and ____ are key components in the pathway
for stimulating skeletal muscle contractions.
a. A b. B c. C d. A and B e. B and C
The primary somatosensory cortex
a. maps the distribution of somatic receptors on the body. b. consists of white matter. c. contains interneurons. d. devotes the largest region to body parts with the greatest sensory acuity. e. includes all EXCEPT “consists of white matter.”
Which object from the first or second stage reports whether an instrument is relevant?
A. Check if the residuals from the second stage regression are uncorrelated with the instrumental variable. B. Check if the coefficient on the instrumental variable in the first stage is statistically distinct from zero. C. Check if the coefficient on the instrumental variable in the second stage is statistically distinct from zero. D. Check if the residuals from the first stage regression are uncorrelated with the instrumental variable.