1) One of the available treatment conditions was a solution of CaCl 2 . How is t

ID: 197400 • Letter: 1

Question

1) One of the available treatment conditions was a solution of CaCl2. How is this salt expected to affect the feeding behavior of T. voraxand why?

a. CaCl2 is not expected to have any affect on the number of food vacuoles formed because calcium is not present in the organism’s environment.

b. CaCl2 is expected to decrease the number of food vacuoles formed because high salt concentrations will kill the cells

c. CaCl2 is expected to increase the number of food vacuoles formed because it is necessary for ciliary movement

d. CaCl2 is expected to decrease the number of food vacuoles formed because it is inhibits ciliary movement

2) One of the available treatment conditions was a T. vorax growth medium adjusted to pH 5. For what purpose was this solution provided?

a. To serve as the negative control since food vacuoles are not formed under acidic conditons

b. To simulate acidification of a freshwater environment due to acid rain

c. To prevent digestion of the India ink particles in the phagolysosome

d. To simulate saltwater encroachment of a freshwater environment

b. CaCl2 is expected to decrease the number of food vacuoles formed because high salt concentrations will kill the cells

1. CaCl2 is expected to increase the number of food vacuoles formed because it is necessary for ciliary movement.

Calcium helps regenerate and contract cilia. and more food vacuoles.

2. to serve as the negative control since food vacuoles are not formed under acidic conditons.

food vacuoles are formed more at PH more than 3.5.

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