Answer the following question given this paragraph: Metals have a wide range of melting points, but most are quite high. Only one metal (mercury) melts below room temperature. Others (such as gallium) are solid at room temperature but would melt at body temperature, so they can be melted simply by holding them in your hand. On the other end of the spectrum, tungsten has a melting point of 3422C. Figure below shows the melting points of various elements in their most common pure form. Q: Name the one metal that melts below room temperature? Choices: - aluminum - gold - bronze - mercury A:
mercury
Answer the following question given this paragraph: Q: Rapidly produced genetic vairants are found in organisms with what type of generation time? Choices: - long - repeating - oscillating - short A:
short
Q: Answer the following question given this paragraph: Atoms have a mass that is based largely on the number of protons and neutrons in their nucleus. Q: The mass of atoms is based on the number of protons and neutrons in what? Choices: - electrons - molecules - components - nucleus A:
A: nucleus
Question: Answer the following question given this paragraph: As you learned in Chapter 1 "Introduction to Chemistry", the mass number is the sum of the numbers of protons and neutrons present in the nucleus of an atom. The mass number is an integer that is approximately equal to the numerical value of the atomic mass. Although the mass number is unitless, it is assigned units called atomic mass. Q: What number is the sum of the numbers of protons and neutrons present in the nucleus of an atom? Choices: - nuclear number - combined number - mass total - mass number A:
Answer: mass number
*Question*
Answer the following question given this paragraph: Native elements contain only atoms of one type of element. They are not combined with other elements. There are very few examples of these types of minerals. Some native elements are rare and valuable. Gold, silver, sulfur, and diamond are examples. Q: What do you call elements that contain only atoms of one type of element? Choices: - typical elements - noble gases - reactive elements - native elements A:
**Answer**
native elements
*Question*
Answer the following question given this paragraph: Which layers of the stem are made of parenchyma cells? a. cortex and pith b. phloem c. sclerenchyma d. xylem Like the rest of the plant, the stem has three tissue systems: dermal, vascular, and ground tissue. Each is distinguished by characteristic cell types that perform specific tasks necessary for the plant's growth and survival. Dermal Tissue The dermal tissue of the stem consists primarily of epidermis, a single layer of cells covering and protecting the underlying tissue. Woody plants have a tough, waterproof outer layer of cork cells commonly known as bark, which further protects the plant from damage. Epidermal cells are the most numerous and least differentiated of the cells in the epidermis. The epidermis of a leaf also contains openings known as stomata, through which the exchange of gases takes place (Figure 30.8). Two cells, known as guard cells, surround each leaf stoma, controlling its opening and closing and thus regulating the uptake of carbon dioxide and the release of oxygen and water vapor. Trichomes are hair-like structures on the epidermal surface. They help to reduce transpiration (the loss of water by aboveground plant parts), increase solar reflectance, and store compounds that defend the leaves against predation by herbivores. Q: Which part of a leaf contains openings known as stomata, through which the exchange of gases takes place? Choices: - stoma - cuticle - phloem - epidermis A:
**Answer**
epidermis