input: OPTIONS:
- conductors
- semiconductors
- destructive insulators
- electric insulators Now, answer this question: Answer the following question given this paragraph: Materials that have high resistance to electric current are called electric insulators . Examples include most nonmetallic solids, such as wood, rubber, and plastic. Their atoms hold onto their electrons tightly, so electric current cannot flow freely through them. Dry air is also an electric insulator. You can learn more about electric insulatorsas well as how to test whether a material is an insulatorby doing the activity at this URL:. Q: What do you call materials that have high resistance to electric current? A:
A:
output: electric insulators

Answer the following question given this paragraph: Fluid Mosaic Model The existence of the plasma membrane was identified in the 1890s, and its chemical components were identified in 1915. The principal components identified at that time were lipids and proteins. The first widely accepted model of the plasma membrane's structure was proposed in 1935 by Hugh Davson and James Danielli; it was based on the "railroad track" appearance of the plasma membrane in early electron micrographs. They theorized that the structure of the plasma membrane resembles a sandwich, with protein being analogous to the bread, and lipids being analogous to the filling. In the 1950s, advances in microscopy, notably transmission electron microscopy (TEM), allowed researchers to see that the core of the plasma membrane consisted of a double, rather than a single, layer. A new model that better explains both the microscopic observations and the function of that plasma membrane was proposed by S. Singer and Garth L. Nicolson in 1972. The explanation proposed by Singer and Nicolson is called the fluid mosaic model. The model has evolved somewhat over time, but it still best accounts for the structure and functions of the plasma membrane as we now understand them. The fluid mosaic model describes the structure of the plasma membrane as a mosaic of componentsincluding phospholipids, cholesterol, proteins, and carbohydratesthat gives the membrane a fluid character. Plasma membranes range from 5 to 10 nm in thickness. For comparison, human red blood cells, visible via light microscopy, are approximately 8 m wide, or approximately 1,000 times wider than a plasma membrane. The membrane does look a bit like a sandwich (Figure 5.2). Q: The existence of the plasma membrane was identified in the 1890s, and its chemical components were identified in 1915. the principal components identified at that time were these? A:

OPTIONS:
- gasses and proteins
- carbohydrates and proteins
- lipids and carbohydrates
- lipids and proteins

Answer: lipids and proteins

Problem: OPTIONS:
- shallowest
- youngest
- thickest
- oldest
Q: Answer the following question given this paragraph: The oldest crust is coldest and lies deepest in the ocean. Q: Which crust lies deep inside the ocean? A:
Answer: oldest

Problem:OPTIONS:
- shapes
- weight
- ions
- ph

Answer the following question given this paragraph: Q: All enzymes have an optimal temperature and what? A:
****
A: ph

Answer the following question given this paragraph: The carpal bones form the base of the hand. This can be seen in the radiograph (X-ray image) of the hand that shows the relationships of the hand bones to the skin creases of the hand (see Figure 8.8). Within the carpal bones, the four proximal bones are united to each other by ligaments to form a unit. Only three of these bones, the scaphoid, lunate, and triquetrum, contribute to the radiocarpal joint. The scaphoid and lunate bones articulate directly with the distal end of the radius, whereas the triquetrum bone articulates with a fibrocartilaginous pad that spans the radius and styloid process of the ulna. The distal end of the ulna thus does not directly articulate with any of the carpal bones. The four distal carpal bones are also held together as a group by ligaments. The proximal and distal rows of carpal bones articulate with each other to form the midcarpal joint (see Figure 8.8). Together, the radiocarpal and midcarpal joints are responsible for all movements of the hand at the wrist. The distal carpal bones also articulate with the metacarpal bones of the hand. Q: The radiocarpal and midcarpal joints are responsible for all movements of the hand and what other part of the body? A:
OPTIONS:
- fingers
- foot
- shoulder
- wrist
wrist

Answer the following question given this paragraph: The skin consists of two distinct layers, an outer layer called the epidermis and an inner layer called the dermis. The epidermis is constantly being renewed as dead cells on the surface are shed. This layer contains melanin-producing melanocytes. The dermis contains blood vessels, nerve endings, hair follicles, and sebaceous and sweat glands. Q: Shedding of dead cells ensures constant renewal of what outer layer of the skin? A:
OPTIONS:
- scale
- cuticle
- dermis
- epidermis

Answer:
epidermis