Scorpions
a. Feed during the day
b. Are most common in the temperate areas of the world
c. Are docile animals that, in spite of their reputation, cannot harm humans
d. Are sensitive to surface waves produced by movement on the ground
e. All of the choices are correct
Answer: d. Are sensitive to surface waves produced by movement on the ground
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Which type of signal receptor does NOT generally involve transduction of a signal with the transfer of a phosphate group? (Select all correct choices.)
A. G protein-coupled receptor B. receptor kinase C. ligand-gated ion channel D. nuclear receptor
You are studying a virus that spends long periods of time latent within a host’s cells but causes massive tissue damage during its active periods. You have found that the surface molecules of this virus mutate quite frequently, but the proteins it requires to reproduce are both unique to this virus and stable across infections. What type of treatment would you recommend for this virus?
a. live viral vaccine b. killed viral vaccine c. antiviral drugs d. chelation therapy
The structure at the tip of a stamen that contains pollen sacs is called the ____
a. filament b. carpel c. anther d. receptacle e. stigma
The structures labeled "B" in the accompanying figure ____
a. prevent movement of materials between cells b. are found in tissues subjected to stretching c. allow the free passage of materials between cells d. are found mostly in heart muscle e. are found in most tissues except in the stomach