If three molecules of a fatty acid having the formula C16H22O2 are each joined to a molecule of
glycerol (C3H8O3) with a dehydration synthesis reaction, the resulting neutral fat molecule would have
the formula
a. C48H66O6.
b. C48H72O8.
c. C51H68O6.
d. C51H72O8.
e. C51H74O9.
C
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What are the characteristics of angiosperms? Check all that apply.
_____ Seed production. _____ Flower production. _____ They do not produce fruit. _____ They produce embryos.
Cells undergo exocytosis ____
a. to pump protons down a concentration gradient b. when replicating c. to secrete protein and wastes from the cell d. to ingest nutrients e. as a means of cellular protection
Tetralogy of Fallot (TF) is a genetic disorder characterized by four major malformations of the heart. The circulation of blood is abnormal, so TF patients have too little oxygen in their blood. Inadequate oxygen levels result in damaged mitochondrial membranes, which in turn cause cells to self-destruct. In 2004, Sarah Kuruvilla and her colleagues looked at abnormalities in the mitochondria of
heart muscle in TF patients. Some of their results are shown in Figure 7.13 (on previous slide). What conclusion do the data support about mitochondrial abnormalities and levels of oxygen saturation of the blood (SPO2)?
1.Abnormalities in size of mitochondria is not an important factor.
2.Abnormalities in number of mitochondria have a significant impact on SPO2.
3.The combination of broken mitochondria and abnormal numbers of mitochondria causes the lowest levels of SPO2.
4.Younger patients have lower levels of SPO2.
With which of the following statements would a biologist be most inclined to agree?
A) Humans and other apes represent divergent lines of evolution from a common ancestor. B) Humans represent the pinnacle of evolution and have escaped from being affected by natural selection. C) Humans evolved from chimpanzees. D) Humans and other apes are the result of disruptive selection in a species of chimpanzee.