Which one of the following is a characteristic of open circulatory systems but NOT closed circulatory systems?
A) a heart
B) a vascular system
C) blood
D) open-ended blood vessels
D
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Plant tissue specialized for conducting fluids is known as ____
a. ground tissue b. protoderm c. vascular tissue d. meristem e. dermal tissue
Smooth muscle is
a. involuntary and nonstriated. b. responsible for movement of the skeleton. c. involved in contraction of the heart. d. connected to bones by tendons. e. involuntary, nonstriated, and involved in contraction of the heart.
Some proteins are important biological buffers because:a
they react with water to produce carbon dioxide, which neutralizes acids. b. they contain acidic as well as basic groups. c. they are able to absorb great amounts of carbon dioxide during condensation reactions. d. they produce carbonic acid upon hydrolysis. e. they contain nonpolar groups that exclude water molecules
Diabetes mellitus type 2 (DM2 ) is partly hereditary and, if uncontrolled, can lead to kidney disease and heart failure and an increased risk of stroke and blindness. From this information alone, you could say that DM2 is an example of ________
A) pleiotropy B) epistasis C) codominance D) polygenes