The olfactory bulb in fish help with
A) smell
B) balance
C) vision
D) color deciphering
Ans: A) smell
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A ___ is a chemical that is released by one animal that affects the physiology and or behavior of another member of the same species.
A) neurotransmitter B) neurochemical C) hormone D) pheromone
You are trying to prepare a DNA karyotype, but this time you forgot to add trypsin to your chromosome preparation. What effect would you expect to see?
A) Dyes would stain the chromosomes darker because more proteins would be present to take up the dye. B) Dyes would not stain the chromosomes as expected because proteins would not be removed from the chromatin and so would block the dye from accessing the DNA. C) Chromosomes would not condense properly, so it would be very difficult to isolate individual chromosomes. D) Chromosomes would be degraded quickly because the trypsin is necessary to promote DNA stability by adding more scaffold proteins to the chromatin. E) The chromosomes would be more difficult to pair up because the trypsin acts as a dye, creating a banding pattern that distinguishes between chromosomes.
What is the principal driving force for movement of water into and through the plant shoot?
a. upward pressure as sugar is forced into the roots b. pumping by the xylem cells c. passive transport d. transpirational pull
Rigid bacteria with a helical cell shape are called ________.
A. vibrios B. spirilla C. coccobacilli D. spirochetes