You are viewing a blood vessel under the microscope. You see three distinct layers, one of which is a thick muscular layer. The layers are separated by extensive elastic tissue. This vessel is most likely a(n)

A) capillary
B) arteriole
C) vein
D) artery


Ans: D) artery

Biology & Microbiology

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Pollination begins when pollen is transferred from the ________ to the ________ of a flower.  

A.  anther, ovary B.  anther, receptacle C.  anther, stigma D.  stigma, embryo sac E.  synergid, egg

Biology & Microbiology

Referring to the ionic bond formation between sodium and chlorine, which of the following is not a true statement?

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A. Na is the chemical symbol for sodium.
B. Sodium donates an electron.
C. Chlorine donates an electron.
D. Sodium becomes positively charged.
E. The bond that is formed is stronger than a hydrogen bond.
 

Biology & Microbiology

An ion is formed ____

a. during covalent bonds b. when water molecules are bound together c. when atoms exchange electrons d. when atoms share electrons equally e. when atoms share electrons unequally

Biology & Microbiology

Which body system transports extracellular fluid and fats to the circulatory system?

A. endocrine B. skeletal C. digestive D. integumentary E. lymphatic

Biology & Microbiology