Which of the following was propagated and promoted for use by the Soil Conservation Service but is now listed as a Federal Noxious Weed?
A) purple loosestrife
B) Australian paperbark tree
C) kudzu
D) evening primrose
C
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Discuss how mutations that eliminate or alter the activity of an enzyme can cause phenotypic effects. What will be an ideal response?
Why is DNA able to store large amounts of information?
a. It contains a large number of different nucleotides. b. Its nucleotides can be arranged in a large number of possible sequences. c. It is capable of assuming a wide variety of shapes. d. The sugar and phosphates can be arranged in many different sequences. e. The nucleotides can be altered to form many different letters in the sequence.
Oil pollution is a serious problem throughout the world. Petroleum kills organisms by:
A) disrupting biological membranes. B) coating surfaces of organisms. C) both of the above.
Each nephron of the kidney consists of a long tubule and associated small blood vessels. Blood cells and plasma proteins are too large to enter with the glomerular filtrate. What is the correct path for the filtrate to follow through the nephron in the production of urine?
A. Bowman's capsule ? collecting duct ? proximal convoluted tubule ? loop of Henle ? distal convoluted tubule B. Bowman's capsule ? distal convoluted tubule ? loop of Henle ? proximal convoluted tubule ? collecting duct C. Bowman's capsule ? loop of Henle ? proximal convoluted tubule ? distal convoluted tubule ? collecting duct D. Bowman's capsule ? proximal convoluted tubule ? loop of Henle ? distal convoluted tubule ? collecting duct E. collecting duct ? proximal convoluted tubule ? loop of Henle ? distal convoluted tubule? Bowman's capsule