Biology EOI Practice Test #5

Name ________________________________

1. The diagram shows an important method of communication between cells in an organism. What is the "chemical" referred to in the diagram? O a. a hormone important in maintaining homeostasis O b. an enzyme detected by a cell membrane receptor O c. DNA necessary for regulating cell function O d. a food molecule taken in by an organism

2. When the bacterium Serratia marcescens is grown on a sterile medium in a perti dish at 30 ^oC, the bacterial colonies are cream colored. When the same bacterium is cultured under identical conditions, except at a temperature of 25 ^oC, the colonies are brick red. This difference in color is most likely due to the

O a. types of nutrients in the culture medium
O b. sterilization of the culture medium
O c. effect of temperature on the expression of the gene for color
O d. effect of colony size on the synthesis of color pigments

3. Thousands of years ago, a large flock of hawks was driven from its normal migratory route by a sever storm. The birds scattered and found shelter on two distant islands, as shown on the map. The environment of island A is very similar to the hawk's original nesting region. The environment of island B is very different from that of island A. The hawks have survived on these islands to the present day with no migration between the populations.
Which statement most accurately predicts the present-day condition of these island hawk populations?
O a. The hawks that landed on island B have evolved more than those on island A.
O b. The hawks that landed on island A have evolved more than those on island B.
O c. The populations on islands A and B have undergone identical mutation.
O d. The hawks on island A have given rise to many new species.

3. Thousands of years ago, a large flock of hawks was driven from its normal migratory route by a sever storm. The birds scattered and found shelter on two distant islands, as shown on the map. The environment of island A is very similar to the hawk's original nesting region. The environment of island B is very different from that of island A. The hawks have survived on these islands to the present day with no migration between the populations. Which statement most accurately predicts the present-day condition of these island hawk populations? O a. The hawks that landed on island B have evolved more than those on island A. O b. The hawks that landed on island A have evolved more than those on island B. O c. The populations on islands A and B have undergone identical mutation. O d. The hawks on island A have given rise to many new species.

4. Which even does not occure between stages 2 and 11 in the process represented in the diagram?
O a. a decrease in cell size
O b. DNA replication
O c. mitotic cell division
O d. fertilization

5. Which change would usually increase competition for food among the squirrel population in a certain area?

4. Which even does not occure between stages 2 and 11 in the process represented in the diagram? O a. a decrease in cell size O b. DNA replication O c. mitotic cell division O d. fertilization

O a. an epidemic of rabies among squirrels
O b. an increase in the number of squirrels killed on the highways
O c. an increase in the number of hawks that prey on squirrels
O d. an increase in the squirrel reproduction rate

The table shows the type of food consumed by various animals in a community. Use the data to answers questions 6 and 7.

6. Undeer normal conditions, which organisms would have the greatest amount of stored energy?
O a. grasshoppers
O b. snakes
O c. plants
O d. hawks
7. Which animals would be classified as herbivores?
O a. snakes
O b. hawks
O c. spiders
O d. grasshoppers

8. During a long-distance run on a hot day, an athlete produces large quantities of sweat. As a result, the kidneys change the rate of urine production. Why is this change important?

O a. Decreased urine production increases the amino acids in the blood.
O b. Increased urine production removes amino acids produced as a result of running.
O c. Decreases urine production allows the body to conserve water.
O d. Increased urine production allows more water to remain in the bloodstream.