Cell Theory

Master Cell Theory! This worksheet covers cells, organisms, and body systems.

Fill in the missing words. Cells are the building blocksof all living things. All organismsare made up of cells. All cells come from other livingcells. All plants and animalsare made up of cells. Cells are made up of elementsincluding carbon and oxygen. Match the term to the concept it best describes. Cell Basic unit of life Organisms Living things CHNOPs The elements that make up living things New cells Can only be produced from older cells Use the graphic organizer above to answer the following questions.The cell is the smallest part of a human that is still _. an element living a theory an egg Cells can only be produced by other _. animals living things plants universes A living thing has to have one or more _. cycles organisms units cells Living or Non-living Decide whether each of the following is a living thing, or a non-living thing. Remember, all living things are made up of cells. Living bacteria animals plants starfish mushroom blood cells Nonliving water sand soil clouds atoms plastic The body of a person or other mammal is a complex organism. The structure of the body has several levels of organization. Which of the following lists the structural levels of the body from smallest to largest cell → tissue → organ → organ system → organism cell → organ → organ system → tissue → organism organ → organ system → cell → tissue → organism organ → organ system → tissue → cell → organism Which statement is NOT part of the cell theory? All cells have a nucleus. Cells come only from other living cells Every living thing is made of one or more cells The cell is the smallest unit and it carries out functions needed to support life. How would a disease that damages the mitochondria (HINT: the organelle known as the powerhouse of the cell) most directly affect the functioning of cells? protein synthesis would be stopped waste materials would remain trapped in the cell hereditary information in the cell would be destroyed energy obtained from food molecules would be reduced The circulatory and digestive systems interact with each other to help maintain homeostasis in the human body. Which pair of actions describes how these two systems work together to maintain homeostasis? taking in oxygen and transporting it to all the cells moving nutrients and fighting infections in the body removing wastes and excreting them out of the body providing nutrients and transporting them to the cells What is a similarity between the respiratory and excretory systems? They both break down food. They both remove waste from the body. They both exchange gases within the body They both transport nutrients throughout the body Karla is reading about a type of single-celled microorganism that can live inside the human body. This type of organism can either be harmful or harmless to people, depending on the type. One harmless type lives in the intestines and helps the body digest food. One harmful type can cause strep throat. Which type of organism is Karla most likely reading about? bacteria fungi parasites viruses