Brain death is characterized by a. two flatline EEG recordings taken 24 hours apart. b. a persistent vegetative state lasting longer than 18 months. c. EEG recordings void of beta waves for at least 48 hours. d. a continuous comatose state lasting longer than 12 weeks.

Transmission electron microscope are best for viewing a) microorganisms in pond water b) internal organs of a mouse c)internal structures of a cell d) surface features of a specimen

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.

Which situation is an example of not doing work? lifting a couch throwing a baseball running up stairs carrying a box