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
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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
Referring to the ionic bond formation between sodium and chlorine, which of the following is not a true statement?
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.
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
Which body system transports extracellular fluid and fats to the circulatory system?
A. endocrine B. skeletal C. digestive D. integumentary E. lymphatic