Which of the following most drectly has a reproductive function in flowering plants? \[ \begin{array}{l}\text { Anther } \\ \text { Guard cell } \\ 09 / 24-16: 39: 37\end{array} \] \( \begin{array}{ll}\text { Pith }\end{array} \) \( \begin{array}{ll}\text { xylem }\end{array} \)

A. Answer True or False. 1. The skull is shaped like a cage. 2. The backbone is made up of many vertebrae.

4. The skull protects the brain. 5. The ribs protect the spinal cord. 6. The ribs are part of the skeletal system.

Use each word to write a sentence about how your body moves. 1. hinge joint 2. ball-and-socket joint

B. Write the letter for the correct answer. \( \begin{array}{lll}\text { 1. A vertebra is part of the } \\ \begin{array}{lll}\text { (a) skull } & \text { (b) backbone } & \text { (c) rib cage }\end{array} \\ \begin{array}{lll}\text { 2. The ribs are attached to the }\end{array} \\ \begin{array}{lll}\text { (a) skull } & \text { (b) brain } & \text { (c) backbone }\end{array} \\ \begin{array}{lll}\text { 3. A group of bones that protects the brain is the } \\ \text { (a) skull } & \text { (b) backbone } & \text { (c) rib cage }\end{array} \\ \begin{array}{lll}\text { 4. The backbone is made up of many cords } & \text { (b) ribs } & \text { (c) vertebrae }\end{array}\end{array} \).

C. Answer the questions. 1. What part of your skeleton can bend without breaking? 2. What do blood vessels do in the bones? 3. Where do new red blood cells come from? 4. What is an unborn baby's skeleton made of? 5. What shapes and supports your arms and legs?