Modified True/False Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true.

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1 Unit 4 Review Modified True/False Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true. 1. A stimulus is anything that threatens the life or well-being of an organism. 2. Organelles are the basic unit of life. 3. Mitochondria can be compared to batteries because they provide energy to a cell. 4. Chloroplasts are found only in animal cells. 5. Chromosomes contain genetic material that directs a cell s growth. 6. Replacement of lost cells occurs through mitosis. 8. Groups of different tissues form organ systems. 9. The excretory system removes solid and liquid waste from the body. Multiple Choice Identify the choice that best completes the statement or answers the question. 10. Which of the following statements about a cell is true? a. All cells contain chloroplasts. b. All cells have a membrane. c. All organisms consist of many cells. d. Cells do not vary in size and shape. 11. Which of the structures in the cell is responsible for storing waste for the cell? a. chloroplast b. cytoplasm c. mitochondrion d. vacuole 12. Which cell structure is responsible for controlling the activity of the cell? a. cell membrane b. chloroplast c. mitochondrion d. nucleus 13. Which cell structure produces the energy provided to the cell? a. cell membrane b. mitochondria c. nucleus d. vacuole 14. Which of the following is an example of a response to a stimulus? a. answering this question b. blinking when a bright light is suddenly shone in your face c. kicking a soccer ball d. staring at a blank TV screen 15. Which of the following structures would distinguish a plant cell from an animal cell? a. a cell membrane b. a cell wall c. cytoplasm d. vacuoles 16. A cell wall is found in which of the following cells? a. all living cells b. animal cells only c. bacteria only d. plant cells only

2 17. Which of the following may be observed in the cells of African violet leaves but not in the cells of rabbits? a. chloroplasts b. chromosomes c. mitochondria d. vacuoles 18. Which of the following characteristics would be exhibited by a living thing? a. the ability to grow, reproduce, and communicate with others b. the ability to grow, respond to its environment, and reproduce c. the ability to use energy, eliminate waste material, and mate with another living thing d. the ability to use energy, eliminate waste, and reproduce 19. What process do cells use to extract energy from their food? a. cellular respiration b. chloroplasts c. mitosis d. photosynthesis 20. Which of these characteristics can be used as evidence that a plant is a living organism? a. the ability to move or change position; the ability to use energy from the Sun to make food b. the ability to move or change position; producing seeds as a means of reproduction c. the ability to use energy from the Sun to make food; shrivelling in response to harsh chemicals d. the ability to use energy from the Sun to make food; producing seeds as a means of reproduction 22. Which of these developments indicate growth in a living organism? a. A toddler gets taller; a caterpillar turns into a butterfly; the number of leaves increases on a tree. b. A toddler gets taller; a caterpillar turns into a butterfly; a person's heart rate increases after exercise. c. A toddler gets taller; the number of leaves increases on a tree; a person's heart rate increases after exercise. d. A caterpillar turns into a butterfly; the number of leaves increases on a tree; a person's heart rate increases after exercise. 23. Which of these are living organisms? a. a dormant tulip bulb; mould growing on bread; an apple ripening on a tree b. a dormant tulip bulb; mould growing on bread; a crystal growing on a rock c. a dormant tulip bulb; an apple ripening on a tree; a crystal growing on a rock d. mould growing on bread; an apple ripening on a tree; a crystal growing on a rock 24. Growth is one of the characteristics of living things. Each of the following grows in size. Which of them is an example of growth in a living organism? a. A balloon gets bigger as air is blown into it. b. A puddle increases in size during a rain storm. c. A snowball grows in size as it is rolled in the snow. d. The lawn grows as the summer season approaches. 25. How do scientists look at objects that are too small to be seen by the unaided eye? a. by increasing the size of objects with scientific equipment b. by using a water-filled flask c. by magnifying objects d. through computer simulation programs 26. In a microscope, what connects the base to the tube? a. arm b. revolving nosepiece c. stage d. tube 27. What is the function of the diaphragm of a microscope? a. It is the part you look through. b. It supports the slide and holds it in position. c. It is a rotating disk that holds two or more objective lenses. d. It is used to control the amount of light that reaches the object.

3 28. Which of the following is true when the power of an objective lens on a microscope is increased? a. You see more of the specimen. b. You see less of the specimen. c. The magnification decreases. d. The field of view increases. 29. Which of the following is part of the cell theory? a. All cells come from previously existing cells; the cell is the basic unit of life. b. All cells have cell membranes; the cell is the basic unit of life. c. All living things are made up of one cell; all cells come from previously existing cells. d. All living things are made up of one or more cells; cells cannot be divided. 30. Which of the following is true about a cell membrane? a. It controls the movement of substances into and out of the cell. b. It is involved in producing energy for the cell. c. It is a fluid-filled space in the cell that stores water and food. d. It is the largest and most visible cell organelle. 31. What is the term for different organs working together to perform a function in the body? a. a cell system b. a muscle c. an organ system d. a tissue 32. What are similar cells working together in the body called? a. a cell system b. a muscle c. an organ system d. a tissue 33. What is the function of the excretory system? a. It adds nutrients to food. b. It defends the body against infection and disease. c. It removes liquid and gaseous wastes from the body. d. It removes nutrients from the body. 34. What is the digestive system responsible for in the body? a. chemically breaking down food b. defending the body against disease c. eliminating material the body cannot use d. transporting nutrients throughout the body 35. What is the function of the respiratory system? a. to transport carbon dioxide into the body and oxygen out of the body b. to transport oxygen into the body and carbon dioxide out of the body c. to transport urine and solid waste material out of the body d. to transport water and nutrients into the body 36. The act of swallowing some saliva that has built up in your mouth requires at least three body systems. Which of the following systems would be involved in this action? a. circulatory system, digestive system, and excretory system. b. digestive system, nervous system, and circulatory system. c. excretory system, respiratory system, and digestive system. d. nervous system, muscular system, and digestive system. 37. Most living organisms have organs that perform functions to keep the organism alive. What are these organs composed of? a. organelles b. organ systems c. specialized muscles d. tissues 38. The human circulatory system is responsible for performing which of the following tasks? a. breaking down food b. ensuring proper lung function c. exchanging oxygen and carbon dioxide d. moving blood throughout the body

4 39. What is the main purpose of muscle tissue in human beings? a. to co-ordinate activities between the body parts b. to connect and support the different parts of the body c. to protect the bones d. to move parts of the body 40. What term could you use to describe a stomach? a. organ b. organism c. organ system d. tissue 41. What term could be used to describe the excretory system? a. organ b. organism c. organ system d. tissue 42. Which system transports food and oxygen to all body cells? a. circulatory system b. digestive system c. nervous system d. respiratory system 43. Jenka has a cold. He stays inside and drinks plenty of fluids, but he still coughs and coughs. Which system is affected by this cold virus? a. circulatory system b. digestive system c. nervous system d. respiratory system 44. Which of the following represents a system? a. blood b. brain, spinal cord, nerves c. heart, kidneys, lungs d. nose, heart, lungs 45. Which of the following describes the levels of organization in an organism, in order from simplest to most complex? a. cells, organs, tissues, organ systems b. cells, tissues, organ systems, organism c. tissues, organs, organism, organ system d. tissues, cells, organs, organ systems 46. Which body system s main organs are the nose, trachea, and lungs? a. circulatory b. digestive c. excretory d. respiratory 47. Which body system contains the lungs and kidneys? a. circulatory b. digestive c. excretory d. respiratory 48. Which statement about human tissue is correct? a. Different types of tissues form different organs. b. Different types of tissues work independently of one another. c. Tissues are composed of only one type of cell. d. Tissues do not play a role in the formation of organ systems.

5 Completion Complete each statement. 1. In order for something to be classified as a living organism, it must be made up of and carry out all life functions. 2. The rotating lenses shown here are called the lenses. 3. To focus an object under low magnification, it is necessary to use the knob. 4. Cellular respiration occurs in the of the cell. 5. The body system responsible for the exchange of oxygen and carbon dioxide is the system. 6. The system transports food and nutrients to all body cells. Short Answer 1. Describe four characteristics that are demonstrated by living things. 2. Identify each of the microscope parts indicated in the diagram.

6 3. Describe the function of each of the following parts of the compound light microscope: a) eyepiece b) arm c) objective lens d) revolving nosepiece e) stage 4. State the cell theory. 5. Identify two structural differences between a plant cell and an animal cell. 6. Use the diagram below to identify each of the following cell parts, giving the letter and the name of the part in your answer: a) the part that releases energy from the food material in the cell b) the part that carries the hereditary material c) the part that allows material to enter or exit the cell

7 7. Use the diagram below to identify each of the following cell parts, giving the letter and the name of the part in your answer: a) the part that is a jelly substance containing the organelles of the cell b) the part that traps sunlight and stores the energy in chemical form c) the part that is a rigid structure surrounding the cell membrane d) the part that sometimes stores waste material 8. Identify and describe 5 systems in the human body. 9. Briefly explain how an organ, such as the heart, and a tissue, such as muscle tissue, are different. 10. What is an organ and why is it important? Give one example of how a particular organ works within its organ system.

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