Hamid et al. (2010) had participants navigate a maze while recording their eye movements. the maze contained landmarks on the walls at corners and at other positions that would not aid maze navigation. after participants learned the maze, the researchers removed half of the landmarks. the results of this study revealed that
a. performance decreased when landmarks were removed that had been viewed longer.
b. participants did not notice that the landmarks were missing and their performance was uneffected.
c. participants had been relying on all landmarks to navigate.
d. performance increased when non-informative landmarks were removed.

How does using straws hurt the sea turtles?

You have been asked to lead a demonstration for the undergraduate microbiology lab course about the uses of negative staining when studying bacteria. a "negative" stain does not stain the bacterial cell itself but stains the space between cells. under magnification, the acidic (negativelycharged) nature of the stain will be repelled by the negatively charged bacterial cell wall and willleave the cell colorless in a stained background. negative stains are used primarily to reveal the presence of negatively charged bacterial capsules; therefore, they are also called capsule stains. encapsulated cells appear to have a halo surrounding them. the negative stain procedure does not require heat fixation, which limits any chances of alteration in bacterial cell shape and size. the bacterial suspension is added to a drop of stain, such as nigrosin or eosin, and drawn across the glass slide using a coverslip.nigrosin staining-not safranin staining-of klebsiella pneumoniae will allow for the visualization of the cell shape and the determination of the presence of a capsule.true/false

What are the characteristics of living things