The ______ is the primary source of all blood cells in adults.

A. liver
B. spleen
C. lymph node
D. red bone marrow


Answer: D. red bone marrow

Biology & Microbiology

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If you were to view a sample of animal tissue under a light microscope and notice an extensive extracellular matrix surrounding a tissue, which tissue type would you most suspect?

A) connective B) cardiac muscle C) epithelial D) nervous E) striated muscle

Biology & Microbiology

Irene knows her blood type is A, but William does not know his blood type. However, William knows that his mother and father both had blood type B. Irene and William's first child is a boy with type O blood. Based on this information, William's blood type could be  

A.  B only B.  either B or O C.  O only D.  either AB or O E.  A only

Biology & Microbiology

During this phase of the cell cycle sister chromatids separate and head towards opposite poles of the cell:

A. Metaphase B. Prometaphase C. Telophase D. Anaphase E. Prophase

Biology & Microbiology

The tertiary lysosome is involved in removal of water from the lumen of the lysosomal vesicle.

a. true b. false

Biology & Microbiology