The advantages that irradiation has over chemical preservation include which of the following?
a. Because no chemicals are added, flavor is not compromised.
b. Globally agreed levels exist.
c. It inactivates all viruses.
d. Both a and b are correct.
Answer: A
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Koko the gorilla was trained by scientists at Stanford University to communicate using American Sign
Language. She was housed in a trailer and interacted with frequently. One day she tore the sink in her trailer out of the wall. When confronted by her trainers about this, Koko blamed her petite female trainer for the damage. What insights might this behavior provide to animal behaviorists?
What will be an ideal response?Which of the following statements about the brain is NOT correct?
A. The medulla oblongata has reflex centers for vomiting, coughing, sneezing, and swallowing. B. The thalamus relays sensory input from lower brain areas to the cerebrum. C. The hypothalamus is concerned with homeostasis and regulation of thirst, hunger, and blood pressure. D. The cerebellum functions in muscle coordination, posture, and balance. E. The pineal gland secretes serotonin, which is involved in mood changes.
GABA receptors play an essential role in neurotransmission in the central nervous system. In response to the appropriate signal, these receptors open up and allow Cl- to flow into the cell. Given this information, GABA receptors can be classified as a
A. Cl- pump. B. gated ion channel. C. symporter. D. gated carrier protein.
Minicells result from mutations that
a. prevent DNA replication. b. prevent septum formation. c. prevent growth of the cell. d. prevent chromosome partitioning. e. cause septa to be formed in the wrong place or to be formed too frequently.