Mammals are united by what features?
A. Hair
B. Placenta
C. Producing milk for their young
D. Both A and C
E. All of the above
Ans: D. Both A and C
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Primitive reptiles first appeared during the _____ period.
A. Carboniferous B. Cambrian C. Devonian D. Ordovician E. Silurian
What tissue type makes up the outer layer of
the skin?
a. simple squamous b. simple cuboidal c. stratified columnar d. simple columnar e. stratified squamous
Research focused on determining the function of different cellular proteins, protein interactions, and protein regulation is called ________ proteomics.
Fill in the blank(s) with the appropriate word(s).
Compared to a direct ELISA, a sandwich ELISA
A) can be designed to be read without a plate reader, making it suitable for home use. B) is less sensitive. C) does not depend on a reporter enzyme. D) does not require unbound antibody to be washed away. E) only requires the use of one antibody.