Problem: OPTIONS:
- evidence
- hypothesis
- theory
- scientific law
Q: Answer the following question given this paragraph: A scientific law is a specific statement that is thought to be never violated by the entire natural universe. Everyday laws are arbitrary limits that society puts on its members. Q: What term describes a specific statement that is thought to be never violated by the entire natural universe? A:
Answer: scientific law

Problem:OPTIONS:
- gas
- lava
- oil
- water

Answer the following question given this paragraph: Geysers erupt because the water is trapped. The water becomes superheated until finally the pressure builds enough for it to break the seal. Q: Geysers erupt because what boiling hot substance is trapped beneath their surface? A:
****
A: water

Answer the following question given this paragraph: Molecules in the cell membrane allow it to be semipermeable. The membrane is made of a double layer of phospholipids (a "bilayer") and proteins ( Figure below ). Recall that phospholipids, being lipids, do not mix with water. It is this quality that allows them to form the outside barrier of the cell. Q: Phospholipids are unable to mix with what? A:
OPTIONS:
- nitrogen
- solids
- air
- water
water

Answer the following question given this paragraph: Atoms cannot only gain extra electrons. They can also lose electrons. In either case, they become ions . Ions are atoms that have a positive or negative charge because they have unequal numbers of protons and electrons. If atoms lose electrons, they become positive ions, or cations. If atoms gain electrons, they become negative ions, or anions. Consider the example of fluorine (see Figure below ). A fluorine atom has nine protons and nine electrons, so it is electrically neutral. If a fluorine atom gains an electron, it becomes a fluoride ion with an electric charge of -1. Q: What's the name for an atom that has gained or lost an electron? A:
OPTIONS:
- an photon
- isotope
- neutrino
- an ion

Answer: an ion

Question: Answer the following question given this paragraph: Habitats Nearly all protists exist in some type of aquatic environment, including freshwater and marine environments, damp soil, and even snow. Several protist species are parasites that infect animals or plants. A few protist species live on dead organisms or their wastes, and contribute to their decay. Q: Nearly all protists exist in some type of aquatic environment, including freshwater and marine environments, damp soil, and even snow. several protist species are parasites that infect animals or plants. a few protist species live on dead organisms or their wastes, and contribute to what? A:
OPTIONS:
- greenhouse gas
- habitat loss
- spontaneous mutation
- their decay
Answer: their decay

input: OPTIONS:
- cell membrane
- cell wall
- placental barrier
- tight junction Now, answer this question: Answer the following question given this paragraph: A tight junction is a watertight seal between two adjacent animal cells (Figure 3.17b). Proteins hold the cells tightly against each other. This tight adhesion prevents materials from leaking between the cells. Tight junctions are typically found in the epithelial tissue that lines internal organs and cavities, and composes most of the skin. For example, the tight junctions of the epithelial cells lining the urinary bladder prevent urine from leaking into the extracellular space. Also found only in animal cells are desmosomes, which act like spot welds between adjacent epithelial cells (Figure 3.17c). They keep cells together in a sheet-like formation in organs and tissues that stretch, like the skin, heart, and muscles. Gap junctions in animal cells are like plasmodesmata in plant cells in that they are channels between adjacent cells that allow for the transport of ions, nutrients, and other substances that enable cells to communicate (Figure 3.17d). Structurally, however, gap junctions and plasmodesmata differ. Q: What is the term for a watertight seal between two adjacent animal cells? A:
A:
output:
tight junction