Petrels (a flying and diving seabird) are thought to be one of the closest living relatives to penguins. What type of genes would be most likely to exhibit different expression patterns between these species?
A. Genes controlling skeletal development.
B. Genes regulating the digestive tract.
C. Genes controlling organ development.
D. Genes regulating salt water tolerance.
Answer: A
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Most drugs used to slow the progress of AIDS fall into which of the following categories?
A. Protein synthesis inhibitors B. RNA polymerase II inhibitors C. Topoisomerase inhibitors D. Reverse transcriptase and protease inhibitors
Cardiovascular disorders are the number ________ cause of death in the United States
Fill in the blank(s) with correct word
Which of the following structures is the smallest?
A) DNA molecule B) chloroplast C) mitochondrion D) lipid bilayer
A cyst formed by a protist functions ________.
A. as a protective mechanism against adverse changes in the environment and in transfer from one host to the next B. in repair of damage to the cell envelope C. in transfer from one host to the next D. as a protective mechanism against adverse changes in the environment