Life Science Review

When Dakota sees his newborn cousin for the first time, he is surprised to see that his cousin's skin and eyes have a yellowish color. Dakota's aunt tells him that this happens when the organ that filters a person's blood does not work properly. Which organ is MOST likely causing Dakota's cousin to look yellowish?

• heart

• liver

• lungs

• pancreas

A variety of animals make the Florida Everglades their home. Many of them must compete for the same food sources. The graph depicts the population changes among species of frogs in the Everglades.

Over the course of a year, which frog species will have the greatest decrease in population because of increased competition for food?

• green tree frog

• cuban tree frog

• squirrel tree frog

• Florida cricket frog

During recess, Renee scraped her knee, so the nurse put a bandage on her skin. Which of the functions below that are normally provided by skin is now being provided by the bandage?

• preventing dehydration

• regulating body temp

• keeping bacteria out of the body

• sensing when her skin has been touched

A scientist has a rock sample that he says was under water at one time. Which statement is evidence to support his claim?

• The scientist is an expert on rocks

• The rock has fish skeleton fossils inside it.

• Many people agree with the scientist’s claim.

• Other scientists believe the rock was under water, too.

Which structure in a plant has a function similar to the function of a skeleton in a mammal?

• exoskeleton

• flower

• leaf

• stem

During dry seasons, alligators make deep holes in the wetlands. Why has the alligator adapted to make a hole its home during these seasons?

• to protect eggs in its nest

• to provide a habitat to other animals

• to cool off during the hot temperatures

• to stay warm during the cool temperatures

Which method would work BEST to make a direct observation about today’s outside temperature?

• use of a radio

• use of a thermometer

• use of an internet report

• use of a weather forecast

Scientists studied a population of harvest mice living in a small area. Some mice have dark-colored fur, and some mice have light-colored fur. The graph below shows how the number of mice with each type of fur color changed over five years.

Which of the following would explain the data in the graph?

• An environmental change killed off most of the plants that the mice eat.

• An environmental change allowed an invasive species to be introduced

• An environmental change reduced the amount of water available to the mice.

• An environmental change caused one fur color to be more visible to predators than the other.

Which plant structure is MOST similar in function to a lizard's eggs?

• flowers

• pollen

• seeds

• stem

A student predicts that if marigold flowers are planted around a group of tomato plants, then fewer insects will eat the tomatoes. Which observation would support the prediction?

• a count of 20 insects before marigolds are planted, and 20 insects after marigolds are planted

• a count of 20 insects before marigolds are planted, and 12 insects after marigolds are planted

• a count of 10 tomatoes before marigolds are planted, and 5 tomatoes after marigolds are planted

• a count of 10 tomatoes before marigolds are planted, and 15 tomatoes after marigolds are planted