In horses, there are four alleles at the A locus. Arranged in dominance sequence, they are:A
(wild) ab (bay) ac (brown) ad (black)
If you bred several bay mares whose sires were brown to a brown stallion whose sire was black, what
type of offspring would be produced and in what proportion? What will be an ideal response?
ab ac ? ac ad; 1/2 bay, 1/2 brown
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Whorl one, the outermost whorl of a flower, makes up the
A. male parts of a flower. B. petals. C. sepals. D. female parts of a flower. E. stem region.
Which type of vessel is one cell layer in thickness?
a. artery b. arteriole c. capillary d. venule e. vein
How is the switch from RNA to DNA for the storage of information an example of a major transition?
a. The switch involved a change in information technology. b. The switch involved individuals taking advantage of an economy of scale. c. The switch involved giving up the ability to reproduce independently. d. All of the above.
The Krebs cycle occurs in the mitochondria. There are nine biochemical reactions involved in the Krebs cycle, and they are highly ordered. Select the correct order. (Note: These are abbreviated and do not show NAD, ADP, ATP, or FAD.)
A. acetyl-CoA joins the Kreb cycle and unites with oxaloacetate ®forming citrate ®which forms beta-ketoglutarate ® which forms succinyl-CoA ® which forms succinate ® which forms fumarate ® which forms malate ® which forms oxaloacetate B. acetyl-CoA joins the Kreb cycle and unites with oxaloacetate ®forming citrate ®which forms alpha-ketoglutarate ® which forms succinyl-CoA ® which forms succinate ® which forms malate ® which forms fumarate ® which forms oxaloacetate C. acetyl-CoA joins the Kreb cycle and unites with oxaloacetate ®which forms alpha-ketoglutarate ® forming citrate ® which forms succinyl-CoA ® which forms succinate ® which forms fumarate ® which forms malate ® which forms oxaloacetate D. acetyl-CoA joins the Kreb cycle and unites with oxaloacetate ®forming citrate ®which forms alpha-ketoglutarate ® which forms succinyl-CoA ® which forms succinate ® which forms fumarate ® which forms malate ® which forms oxaloacetate