You go the store to buy some lard for cooking. You notice when you get home that the lard is solid at room temperature. What does this tell you about the fat in lard, and how does this explain it being solid at room temperature? What type of fat would
not be solid at room temperature, and why?
What will be an ideal response?
Lard is made up of saturated fat that stacks up when cool, thereby forming solids. Unsaturated fat has kinks caused by carbon-carbon double bonds, which prevents it from stacking, so it remains liquid at room temperature.
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Hemophilia A is an X-linked recessive genetic condition. In humans it is due to a mutation in the F8 gene, which encodes a protein called coagulation factor VII. Coagulation factors are proteins important in blood clotting. Individuals with hemophilia, when injured, bleed longer than a normal, healthy individual; the inability to normally clot blood can be life threatening. Hemophilia is much more common in males than in females. Which of the following does NOT explain why this is so?
A. A female with one defective allele makes enough normal coagulation factor VII to clot blood and will not have hemophilia A B. Males are hemizygous for the F8 gene, so they will have hemophilia A if they have one defective allele C. Females have to receive a defective allele from both their mother and their father to get hemophilia A D. Males have to receive a defective allele only from their father to get hemophilia A
__________ are free-living and usually kill their prey. Fill in the blank(s) with the appropriate word(s)
The Dlx gene encodes a transcription factor that signals clusters of embryonic cells to ____ and gives rise to an appendage.
A. fold into the cardiac muscle B. protrude from the body C. form reproductive structures D. induce apoptosis in cells lining the appendages E. develop into the immune system
While on his voyage on the HMS Beagle, Darwin was strongly influenced by this book.
A. Encyclopedia Britannica B. The Origin of Species by Means of Natural Selection. C. The Beagle D. Principles of Geology by Charles Lyell