cDNA is copied from
A) DNA.
B) protein.
C) mRNA.
D) a pictogram.
C) mRNA.
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A stamen consists of an anther and a filament
____________________ Indicate whether the statement is true or false.
Researchers testing new drugs usually give the drug to one group of people and give placebos, "sugar pills," to another group. The group receiving the placebo ________
A) is the control group B) constitutes the experimental group C) is needed so that the test will be repeated enough times D) is a backup in case some of the people getting the drug drop out of the test
Which of the following vectors transmit scrub typhus?
a. Lice b. Ticks c. Fleas d. Chiggers
Individuals with Turner syndrome have which of the following sex chromosome complements?
A) XO B) XX C) XYY D) XXY E) XXX