REVIEW SBM - 4

The bone structures of a porpoise flipper and a bat wing are shown below

Which of the following conclusions is best supported by the structure of each limb

• a. The porpoise and bat share a common ancestor.

• b. The porpoise and bat limbs are adapted primarily for grasping.

• c. The porpoise and bat evolved relatively recently in geologic history.

• d. The porpoise and bat limbs are designed to support the entire weight of the animal.

Which of the following best explains how the fossil record provides evidence that evolution has occurred?

• It indicates that forms of life existed on Earth at least 3.5 billion years ago.

• It indicates the exact cause of structural and behavioral adaptations of organisms.

• It shows how embryos of many different vertebrate species are very similar.

• It shows that the form and structure of groups of organisms have changed over time.

Which of these best completes this concept map

• an animal cell

• a virus

• a plant cell

• a prokaryotic cell

The diagram (see image) represents a beaker containing a solution of various molecules involved in digestion

• A and D

• B and C

• B and E

• D and E

In the human digestive system, the enzyme trypsin acts on proteins. The optimal temperature for the enzyme is approximately 40°C. Which of the following graphs shows how the activity of the enzyme most likely relates to the temperature of the reaction environment?

• A

• B

• C

• D

The diagram below shows an animal cell in a beaker containing a solution of sugar and water. The cell membrane is permeable only to water.

Which statement describes the relationship between the animal cell and the contents of the beaker?

• There is a higher concentration of water inside the cell than outside the cell.

• There is a higher concentration of sugar inside the cell than outside the cell.

• There is an equal concentration of water inside the cell as outside the cell.

• There is an equal concentration of sugar inside the cell as outside the cell.

Which of the diagrams below best represents the net movement of molecules in osmosis

• A

• B

• C

• D

Use the information and the diagram below to answer

Starch turns blue-black in the presence of iodine solution. A selectively permeable dialysis sac containing a starch solution is placed into a beaker of iodine solution.

Which of these processes is demonstrated by the experiment shown in the diagram?

• a. cellular respiration

• b. active transport

• c. exocytosis

• d. diffusion

Molecules A and B come in contact with the cell membrane of the same cell. Molecule A passes through the membrane readily, but molecule B does not. Which statement could describe molecules A and B?

• a. Molecule A is a protein, and molecule B is a fat.

• Molecule A is a starch, and molecule B is a simple sugar.

• Molecule A is an amino acid, and molecule B is a simple sugar.

• Molecule A is a simple sugar, and molecule B is a starch.

In Siamese cats, an enzyme determines the color of the fur. On the cooler places of the body, the enzyme causes darker fur. On the warmer parts of the body, the enzyme does not function.

Which of the following statements best explains how temperature affects this enzyme?

• a. Cooler temperatures denature the enzyme.

• b. Cooler temperatures cause more enzyme production.

• c. The enzyme is active in a specific temperature range.

• d. Heat allows the enzyme to break down white pigment.