Answer the following question given this paragraph: The majority of solids are crystalline in nature. A crystal is a substance in which the particles are arranged in an orderly, repeating, three-dimensional pattern. Particles of a solid crystal may be ions, atoms, or molecules, depending on the type of substance. The three-dimensional arrangement of a solid crystal is referred to as the crystal lattice . Different arrangements of the particles within a crystal cause them to adopt several different shapes. Q: The majority of solids are what in nature? Choices: - gases - complex - liquids - crystalline A:
crystalline
(Question)
Answer the following question given this paragraph: Mollusks are divided into ten living classes, including the familiar gastropods, cephalopods, and bivalves. Q: Gastropods, cephalopods, and bivalves are examples of what class? Choices: - animals - invertebrates - cetaceans - mollusks A:
(Answer)
mollusks
Ques: Answer the following question given this paragraph: In 1858, after using microscopes much better than Hooke's first microscope, Rudolf Virchow developed the hypothesis that cells only come from other cells. For example, bacteria, which are single-celled organisms, divide in half (after they grow some) to make new bacteria. In the same way, your body makes new cells by dividing the cells you already have. In all cases, cells only come from cells that have existed before. This idea led to the development of one of the most important theories in biology, the cell theory . Q: Rudolf virchow developed the hypothesis that cells only come from other cells in what year? Choices: - 1898 - 1868 - 1848 - 1858 A:
Ans: 1858
(Q).
Answer the following question given this paragraph: Formaldehyde is a gas at room temperature. Acetaldehyde boils at 20C; in an open vessel, it boils away in a warm room. Most other common aldehydes are liquids at room temperature. Q: What form does formaldehyde take at room temperature? Choices: - solid - liquids - plasma - gas A:
(A).
gas
Ques:Answer the following question given this paragraph: Other lipoproteins also transport lipids throughout the body, but different types of lipoproteins tend to serve different functions. We will discuss some of these differences in the section below on cholesterol and heart disease. Lipoproteins are often classified into five different groups based on their densities. In increasing order of density, these groups include chylomicrons, very-low-density lipoproteins (VLDL), intermediate-density lipoproteins (IDL), low-density lipoproteins (LDL), and high-density lipoproteins (HDL). Q: On what basis are lipoproteins classified? Choices: - diameter - mass - weight - density A:

Ans:density
Answer the following question given this paragraph: In some amines, the nitrogen atom replaces a carbon atom in an aromatic hydrocarbon. Pyridine (Figure 20.17) is one such heterocyclic amine. A heterocyclic compound contains atoms of two or more different elements in its ring structure. Q: What type of compound contains atoms of two or more different elements in its ring structure? Choices: - aldehyde - polymer - hydrocarbon - heterocyclic A:
heterocyclic