*Question*
Q: The distinctive appearance of what tissue is due to polysaccharides called chondroitin sulfates? Read this paragraph and choose the correct option from the provided answers: Cartilage The distinctive appearance of cartilage is due to polysaccharides called chondroitin sulfates, which bind with ground substance proteins to form proteoglycans. Embedded within the cartilage matrix are chondrocytes, or cartilage cells, and the space they occupy are called lacunae (singular = lacuna). A layer of dense irregular connective tissue, the perichondrium, encapsulates the cartilage. Cartilaginous tissue is avascular, thus all nutrients need to diffuse through the matrix to reach the chondrocytes. This is a factor contributing to the very slow healing of cartilaginous tissues. The three main types of cartilage tissue are hyaline cartilage, fibrocartilage, and elastic cartilage (Figure 4.16). Hyaline cartilage, the most common type of cartilage in the body, consists of short and dispersed collagen fibers and contains large amounts of proteoglycans. Under the microscope, tissue samples appear clear. The surface of hyaline cartilage is smooth. Both strong and flexible, it is found in the rib cage and nose and covers bones where they meet to form moveable joints. It makes up a template of the embryonic skeleton before bone formation. A plate of hyaline cartilage at the ends of bone allows continued growth until adulthood. Fibrocartilage is tough because it has thick bundles of collagen fibers dispersed through its matrix. The knee and jaw joints and the the intervertebral discs are examples of fibrocartilage. Elastic cartilage contains elastic fibers as well as collagen and proteoglycans. This tissue gives rigid support as well as elasticity. Tug gently at your ear lobes, and notice that the lobes return to their initial shape. The external ear contains elastic cartilage. Choices: - bone - collagen - membrane - cartilage A:
**Answer**
cartilage

*Question*
Q: What class of organisms help decompose matter to release nutrients and make nutritious food for other organisms ? Read this paragraph and choose the correct option from the provided answers: If so, then you have encountered fungi . Fungi are organisms that belong to the Kingdom Fungi ( Figure below ). Our environment needs fungi. Fungi help decompose matter to release nutrients and make nutritious food for other organisms. Fungi are all around us and are useful in many ways. Choices: - bacteria - yeast - coral - fungi A:
**Answer**
fungi

*Question*
Q: Which element has an atomic number of 16? Read this paragraph and choose the correct option from the provided answers: The atomic number of sulfur is 16. Therefore, in a neutral atom of sulfur, there are 16 electrons. Saylor URL: http://www. saylor. org/books. Choices: - acid - methane - oxygen - sulfur A:
**Answer**
sulfur

*Question*
Q: What term is used to describe a simple diagram that shows one way energy flows through an ecosystem? Read this paragraph and choose the correct option from the provided answers: A food chain is a simple diagram that shows one way energy flows through an ecosystem. You can see an example of a food chain in Figure below . Producers form the base of all food chains. The consumers that eat producers are called primary consumers. The consumers that eat primary consumers are secondary consumers. This chain can continue to multiple levels. Choices: - water cycle - food pyramid - fuel chain - food chain A:
**Answer**
food chain