Hari is experiencing intense pain in one point in his body. Maryam has the perfect solution! She has a wonderful drug that is guaranteed to take away all pain, and she wants Hari to take it before going to the doctor
Why should Hari not take the drug, according to the information in this chapter?
Two answers arise from the chapter. The pain prevents him from further injuring himself, and the doctor needs to know where he is hurt so that Hari can be treated.
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Which conclusion do the data best support?
1.one year is an adequate time frame to show the effects of treatment on fire ant populations
2.fire ant populations develop resistance to pesticides
3.fire ant populations have natural ups and downs
4.fire ants are long-lived organisms
Conduction from node to node
a. occurs only in the central nervous system. b. is a rapid type of nerve conduction. c. occurs between nerves and muscles. d. involves the "jumping" of impulses. e. is a rapid type of nerve conduction and involves the "jumping" of impulses
Herring gulls feed their chicks by regurgitating food for the chick in the nest. When a chick pecks at the red spot on the gull's beak, the parent regurgitates the food. Interestingly, the chicks will peck at any red spot, whether it is attached to a gull or not. Which features of this behavior are correctly labeled? (Check three.)
A. Key stimulus -- the red spot B. Innate releasing mechanism -- the red spot C. Key stimulus -- the shape of the parent's beak D. Key stimulus -- the regurgitated food E. Fixed action pattern -- pecking at the spot F. Fixed action pattern -- finding a healthy variety of food for the chick G. Innate releasing mechanism -- neural circuit that induces pecking in response to a red spot
Translation in bacterial and eukaryotic cells has many similarities, but there are also several key differences. Which of the following is one of those differences that is seen in eukaryotes?
A) Eukartyotic mRNA contains a Shine—Dalgarno sequence that increases the efficiency of translation. B) Eukaryotes only require one release factor that recognizes all three stop codons. C) Translation and transcription are coupled. D) Eukaryotes use the 5? G-cap and Poly-A-tail on their mRNAs to initiate translation. E) Eukaryotic ribosomes are smaller with fewer proteins and RNA molecules.