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A coverslip should be slowly lowered from a 45° angle onto a slide in order to*
A substance is most likely to diffuse into a cell when*
Base your answer to question 3 on the information and diagrams below and on your knowledge of biology.
The drawings below were made during a laboratory exercise in which a microscope was used to view slides of preserved protozoa. The microscope had a 10× eyepiece and two different objectives.
Which statement about the size of the organisms is correct?*
Base your answers to questions 4 on the diagram below and on your knowledge of biology. The diagram represents a model cell setup. The locations of three different substances are indicated in the diagram.
Which statement best describes what will most likely happen after several minutes?*
The diagram below represents a compound light microscope. Several parts have been labeled.
In order to make an image brighter, which labeled part of the microscope would most likely be adjusted?*
Cell membranes are said to be selectively permeable. Which statement best explains what selectively permeable means?*
Base your answers to questions 7 on the information below and on your knowledge of biology.
One of the effects of Hurricane Katrina, which devastated New Orleans in 2005, was the death of almost all of the plants in flooded areas. Initially, toxic chemicals and bacteria were suspected as a possible cause. Scientists later determined that the salt concentration in the floodwater caused the plants to die.
The death of the plants was most likely due to*
The diagram below represents a laboratory setup used to demonstrate the movement of molecules across a selectively permeable membrane.
In the diagram below, draw the 5 starch and the 12 glucose molecules to show where they would most likely be located after 15 minutes. 
The diagram below represents a laboratory technique.
State one reason a student would use this technique during a scientific investigation. *
Base your answers to questions 10 on the information below and on your knowledge of biology.
An athlete bought a sport gel food and wanted to test it to see if it contained fats, starches, and glucose. The tests that the student used are shown in the table below.
The athlete received the following results from the tests.
Identify the contents of the sports gel. *
There is a group of plants, known as halophytes, that has traits that enable them to survive in salty environments. Describe one change, other than death, that would be observed in the cells of a plant that did not have these traits and was planted in a salty environment. *
Base your answers to questions 12 on the information below and on your knowledge of biology.
The diagram below represents a lab setup. The artificial cell (dialysis tube) contains a starch solution and the beaker contains a solution of starch indicator and water. The setup is left undisturbed for twenty minutes.
Identify one molecule, present in this setup, that will be able to pass through the dialysis tubing. *
Base your answers to questions 13 on the information below and on your knowledge of biology.
An artificial cell filled with a glucose solution was placed in a beaker of water, as represented below. The beaker was left undisturbed for 20 minutes.
In the diagram below, draw in the expected location of the glucose molecules after 20 minutes. 
State one advantage of using a stain to study frog skin cells with a microscope. *
Base your answers to questions 15 on the diagram below and on your knowledge of biology. The diagram represents a cell and its changes as a result of two laboratory procedures, A and B.
Describe procedure A and explain why it would cause the change shown. *