The average pulse rate of your black worm went from a baseline average of 11 pulses per minute to an average of 7 pulses per minute after a drug was introduced. Which of the following drugs might cause this? (More than one choice may be possible).a. Nicotine
b. Caffeine
c. Alcohol

10. in which phase will crossing-over occur? a. mitosis b. metaphase ii c. prophase i d. meiosis ii

Which plate boundary causes plates to collide forming mountain ranges, volcanoes, and island arcs? give an example of this type of plate boundary. 2. at which plate boundary do rifts and mid-oceans ridges form? give an example of this type of plate boundary. 3. at which plate boundary do plates slide past each other while moving in opposite directions? give an example of this type of boundary.

The fluid mosaic model of the membrane proposed that membranes