What I Know Directions: Read each question carefully and choose the best answer from the given choices. Write the letter of your answer in your Science activity notebook.
1. Which of the following statements best describes organs and tissues? A. Organs and tissues are made up of cells. B. Organs and tissues make up an organ system. C. Organs make up organ systems, cells make up tissues, D. Organs make up organ systems; tissues make up organs.
2. The organ systems of plants consist of the root and shoot systems. Why is it important for these organ systems to work together? A. For growth and survival B. To avoid floods and strong winds C. To avoid pests and other animals D. For survival during droughts and earthquakes
3. Which level of biological organization is made up of a group of similar cells that perform a specific function? A. Organ B. Organism C. System D. Tissue
4. Which of the following is formed by a group of cells and tissues that work together to carry out a specific function? A. Cell B. Organ C. Organism D. Organ System 5. At which level of biological organization can the characteristics of life be carried out? A. Cell B. Organ C. Organism D. Organ System 6. To which level of biological organization does the human heart belong? A. Cell B. Organ C. Organism D. Organ System​