*Question*
Q: The vagina connects to which internal organ? Read this paragraph and choose the correct option from the provided answers: The vagina is a cylinder-shaped organ found inside of the female body. One end of the vagina opens at the outside of the body. The other end joins with the uterus. During sexual intercourse, sperm may be released into the vagina. If this occurs, the sperm will move through the vagina and into the uterus. During birth, a baby passes from the uterus to the vagina to leave the body. Choices: - artery - valves - ovaries - uterus A:
**Answer**
uterus

*Question*
Q: What is unique and found in all living things because it can form up to four covalent bonds between atoms or molecules? Read this paragraph and choose the correct option from the provided answers: Chapter 2 1 Figure 2.3 Carbon-12 has six neutrons. Carbon-13 has seven neutrons. 3 Figure 2.24 C 4 A 6 C 8 D 10 C 12 D 14 Ionic bonds are created between ions. The electrons are not shared between the atoms, but rather are associated more with one ion than the other. Ionic bonds are strong bonds, but are weaker than covalent bonds, meaning it takes less energy to break an ionic bond compared with a covalent one. 16 Buffers absorb the free hydrogen ions and hydroxide ions that result from chemical reactions. Because they can bond these ions, they prevent increases or decreases in pH. An example of a buffer system is the bicarbonate system in the human body. This system is able to absorb hydrogen and hydroxide ions to prevent changes in pH and keep cells functioning properly. 18 Carbon is unique and found in all living things because it can form up to four covalent bonds between atoms or molecules. These can be nonpolar or polar covalent bonds, and they allow for the formation of long chains of carbon molecules that combine to form proteins and DNA. Choices: - hydrogen - oxygen - potassium - carbon A:
**Answer**
carbon

*Question*
Q: What are groups of atoms that behave as a single unit called? Read this paragraph and choose the correct option from the provided answers: Molecules are groups of atoms that behave as a single unit. Choices: - protons - particles - ions - molecules A:
**Answer**
molecules

*Question*
Q: Prostaglandins also help regulate the aggregation of platelets, one step in the formation of what? Read this paragraph and choose the correct option from the provided answers: Choices: - bloats - acne - cysts - blood clots A:
**Answer**
blood clots