When you pick up your backpack and sling into onto your shoulder, your biceps contract
What must occur for your arm to move back down to your side as you walk away?
a. An antagonistic muscle must contract.
b. The tendon connected to the biceps must elongate.
c. No muscles must contract.
d. Not only must an antagonistic muscle contract, but also the tendon connected to the biceps
must elongate
A
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If two otherwise dissimilar organisms share similar genomic DNA, to what would you attribute the genomic similarity?
A. The shared genes are ancient and probably no longer function within the altered physiological states of modern organisms. B. The shared genes have evolved a number of times and have no phylogenetic significance. C. The two taxa are more closely related than formerly believed. D. The shared genes developed early in evolution and are likely to be applicable to a wide diversity of organisms. E. DNA is not a reliable basis for phylogenetic decisions.
Branched extensions that receive information
from other cells are called
a. axons. b. dendrites. c. interneurons. d. sensory neurons. e. cell bodies
Which of the following does NOT describe the
Casparian strip? a. waxy b. component of the endodermis c. permeable d. barrier e. waterproof
Adding ________ to municipal water supplies will reduce the rate of tooth decay
A) peroxide B) fluoride C) aldehyde D) chloride