In which organ does the maturation of T cells take place

a) spleen
b) lymph node
c) red bone marrow
d) thymus
e) pancreas


Answer: d) thymus

Biology & Microbiology

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____ is one of the substances that maintains our blood pH between 7.35 and 7.45

a. Water b. Carbonic acid c. Hydrochloric acid d. Hydrogen peroxide e. Sodium hydroxide

Biology & Microbiology

Ions diffuse across membranes through specific ion channels down _____

A) their chemical gradients B) their concentration gradients C) the electrical gradients D) their electrochemical gradients

Biology & Microbiology

If you were to use antibodies that were chemically bonded to a stain in order to visualize the expression pattern of a protein in a fixed tissue, what experimental techniques and equipment would be applicable?

A. antibody interference assay, bright-field microscopy B. immunohistochemistry, dark-field microscopy C. immunohistochemistry, bright-field microscopy D. DAPI or Hoechst stains, fluorescence microscopy

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Every node in a phylogenetic tree represents a(n) ________

A) common ancestor B) extinction event C) transitional form D) sister species

Biology & Microbiology