Dennis had a history of heart disease in his family and was reducing his intake of saturated fats. Saturated means each carbon atom is bonded to as many hydrogen atoms as it can accept. If a carbon were bonded to two carbons, how many hydrogens could it accept?
A. 0
B. 1
C. 2
D. 3
E. 4
Answer: C
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Porins are channels in the outer membranes of gram-positive Bacteria
Indicate whether the statement is true or false.
You are breeding different varieties of roses in your garden. When you cross a true-breeding yellow "Texas Beauty" rose with a true-breeding "Ruby" red rose, you get all red roses. But when you cross a "Texas Beauty" yellow with the yellow variety "Jealousy," you get a 9:7 ratio of red to yellow flowers! What can you conclude from these results?
A. The environment, and not genes, influences pigment in these rose varieties. B. There are epistatic interactions between at least two genes for rose pigment. C. The red allele is dominant to the yellow allele. D. There is a mutation in the gene for yellow pigment in the "Jealousy" variety. E. There is no recessive allele for the red pigment gene.
The chorion is produced from which primary tissue layer(s)?
a. ectoderm and endoderm b. ectoderm and mesoderm c. endoderm and mesoderm d. ectoderm only e. endoderm only
Smoking may increase your risk of lung cancer, but it does not affect the risk of bladder cancer.
a. true b. false