Lian, at 12 years old, was barely 3 feet tall. What hormone might she take to grow taller?
A) growth hormone B) calcitonin C) estrogen D) aldosterone
Answer: A
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Which is usually true of archaea?
A. They are found as rods, spheres, or spirals. B. They reproduce by binary fission. C. They contain rigid cell walls. D. They are found as single cells. E. All of the choices are correct.
A mountain rain shadow is the
a. arid area on the windward slope. b. wet area on the windward slope. c. arid area on the leeward slope. d. wet area on the leeward slope. e. arid area on either slope.
Many people think the term "theory" means someone's idea about something. Explain the scientific use of the term "theory," especially as it relates to the biological concept of evolution.
What will be an ideal response?
We consider the rare event of viral-induced in vivo transformation of host cells as a "failure" of the virus' replication cycle because
a) Viral genomes normally don't integrate into the host genome b) Successful viral replication usually results in host cell death c) Viruses need to keep the cell in G1 phase in order to make more viral particles d) Viral replication in a cell effectively shuts down expression of all host genes