A Group of Single Cell Organisms Collected from the Ocean

question 49

Multiple Choice

A group of single cell organisms collected from the ocean was brought into the lab for examination. The lab assistant was concerned that the water had become full of toxic waste products and so added clean water to the culture. All of the organisms died, and when she looked at them under the microscope, all she could see were bits and pieces of them scattered throughout the water. What likely happened?

• A)She added water that was hypotonic to the culture of organisms, and they ruptured.
• B)She added sea water to which she had added too much salt, and they ruptured.
• C)She added water isotonic to the organisms, causing too much water to move in and out of the organism, and they ruptured.
• D)She added too little salt to the sea water she added, and the organisms all lost too much water and shriveled up.

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Definitions:

Depository Bank

A financial institution that holds and manages securities (stocks, bonds, etc.) for its clients and may also offer other banking services.

Payor Bank

A bank that is responsible for paying a check or draft presented for payment against an account.

Depositary Bank

A financial institution that holds securities, such as stocks or bonds, in electronic or physical form, for investors.

Cashier's Check

A check guaranteed by a bank, drawn on the bank's own funds and signed by a cashier.