You suspect that your roommate may be abusing drugs. He exhibits the following symptoms: aggressiveness, bursts of extreme energy followed by "crash" periods, and delusions. Which drug may be responsible?
A) amphetamines
B) LSD
C) marijuana
D) heroin
A
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If crossing over occurred in mitosis, would it have an impact on the resulting cells? What will be an ideal response?
What is the key difference between protostomes and deuterostomes?
a. Protostomes are animals with soft exteriors and deuterostomes are animals with hard exteriors (i.e., shells). b. Protostomes represent a lineage of bilaterally symmetrical animals, whereas deuterostomes represent a lineage of radially symmetrical animals. c. The protostome gut develops from back to front and the second opening becomes the mouth. The deuterostome gut develops from front to back, so the first opening is the mouth. d. The protostome gut develops from front to back, so the first opening is the mouth. The deuterostome gut develops back to front and the second opening becomes the mouth. e. Protostomes represent animals that are prokaryotes, and deuterostomes represent all over animals.
Which of the following groups is crucial to the structure and function of the sex hormones estrogen and testosterone?
A) Nucleic acids B) Lipids C) Carbohydrates D) Proteins
The important solvent associated with living things is
A. ethyl alcohol. B. water. C. carbon dioxide. D. sodium chloride. E. benzene.