Some facts about a bird called the painted redstart are listed in the box shown. Which fact best describes one way this bird changes its environment to meet its needs? (5.9A)

In fall and winter many trees lose their leaves in response to cooler temperatures and---(5.9A)

A teacher is setting up the terrarium shown below in a science classroom. Which of these organisms is best suited for the terrarium? (3.9A)

A prickly pear cactus is shown here. The roots of the prickly pear cactus spread out in a wide underground network. How does this type of root system benefit a prickly pear cactus? (5.9A)

Some facts about birds called cattle egrets are listed in the table. Which of these facts best describes how these birds depend on other animals to survive? (5.9A)

An African savanna is a grassland with shrubs and a few small trees. It has warm temperatures all year long, a dry winter season, and a rainy summer season. Which group of animals is most likely supported by an African savanna? (3.9A)

The table lists ways that four organisms obtain energy. Which organism obtains energy without depending on another organism? (5.9A)

The table lists the preferred diet of several types of birds. Based on this information, which two types of birds do not compete for food resources? (5.9A)

A student observes the following activities while walking in a park. Which of these living organisms was interacting with another living organism in the environment? (5.9A)

A student observing birds in a park records some ways that birds interact with living and nonliving parts of their environment. All the following observations are ways that a bird interacts with nonliving parts of its environment except--- (5.9A)

Tropical climates have warm temperatures and abundant sunlight all year. What must be available for plants in these climates to make their own food throughout the year? (5.9A)

In parts of the East Texas Piney Woods ecosystem, there are forests with many tall pine trees. These thick forests have few other type of tall trees besides pine trees. The other plants growing in the ecosystem are usually small shrubs, grasses, and other short trees. A student wants to know what type of birds live in the Piney Woods region. The student reads the table shown about four different birds. Based on the table, which bird is most likely to lie in Texas's Piney Woods region? (3.9A)

A farmer is reading a nature guide to learn how to make change to a pond so that it will attract and support wildlife. The guide gives the suggestions listed. Which suggestion involves interactions between two groups of living organisms? (5.9A)

Green anole lizards are bright-green reptiles native to the southeastern United States and the Caribbean islands. They can be kept in terrariums to study their behavior and how they interact with their environment. Which observation describes this anole lizard interacting with the living elements in its environment? (5.9A)

A student studying East Africa reads these facts about the Serengeti National Park in Tanzania. The student thinks that parts of Texas are probably similar to the Serengeti. Based on the following descriptions, which of these Texas animals would be least likely to live in the Serengeti's grasslands? (3.9A)

Many gardeners use red worms like the ones shown to turn vegetable and fruit scraps into topsoil for plants. The gardeners build a worm farm in a large container lined with old newspapers and filled with moist garden soil. The worms eat about half their body weight daily and produce waste that can be used as plant fertilizer. The container for a worm farm needs to have a lid, but the lid must be left partially open because worms require which of the following in order to survive? (5.9A)

Which of these describes one or more living organisms that depend on another living organism to survive? (5.9A)

Aquatic plants have adaptations that help them live in water. For example, the structures needed for making food are located on the tops of floating plant leaves. This adaptation helps the plants--(5.9A)

The table lists characteristics of four types of animals. What features do the ecosystems in which these animals live most likely have in common? (3.9A)