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

Biology & Microbiology

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Primitive reptiles first appeared during the _____ period.

A. Carboniferous B. Cambrian C. Devonian D. Ordovician E. Silurian

Biology & Microbiology

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

Biology & Microbiology

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).

Biology & Microbiology

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.

Biology & Microbiology