Q: What is the pair of bean-shaped organs situated just above the waist? Read this paragraph and choose the correct option from the provided answers: The kidneys are a pair of bean-shaped organs just above the waist. A cross-section of a kidney is shown in Figure below . The function of the kidney is to filter blood and form urine. Urine is the liquid waste product of the body that is excreted by the urinary system. Nephrons are the structural and functional units of the kidneys. A single kidney may have more than a million nephrons!. Choices: - pancreas - aorta - lungs - kidneys A:
kidneys

Q: People with type o blood are often called what? Read this paragraph and choose the correct option from the provided answers: Recall that people with type O blood do not have any antigens on their RBCs. As a result, type O blood can be given to people with blood types A, B, or AB. If there are no antigens on the RBCs, there cannot be an antibody reaction in the blood. People with type O blood are often called universal donors . Choices: - flexible donors - complete donors - likely donors - universal donors A:
universal donors

Q: Which highly valuable substance found in jewelry has a density of about 19 g/cm^3? Read this paragraph and choose the correct option from the provided answers: Samples that are the same size, but have different densities, will have different masses. Gold has a density of about 19 g/cm 3 . Pyrite has a density of only about 5 g/cm 3 . Quartz is even less dense than pyrite, and has a density of 2.7 g/cm 3 . If you picked up a piece of pyrite and a piece of quartz that were the same size, the pyrite would seem almost twice as heavy as the quartz. Choices: - diamonds - rubies - silver - gold A:
gold

Q: Compounds that form from two or more nonmetallic elements are called what? Read this paragraph and choose the correct option from the provided answers: Compounds that form from two or more nonmetallic elements, such as carbon and hydrogen, are called covalent compounds . In a covalent compound, atoms of the different elements are held together in molecules by covalent bonds. These are chemical bonds in which atoms share valence electrons. The force of attraction between the shared electrons and the positive nuclei of both atoms holds the atoms together in the molecule. A molecule is the smallest particle of a covalent compound that still has the properties of the compound. Choices: - ionic bonds - valent bonds - hydrogen bonds - covalent bonds A:
covalent bonds