Answer the following question given this paragraph: The Diversity of Life The fact that biology, as a science, has such a broad scope has to do with the tremendous diversity of life on earth. The source of this diversity is evolution, the process of gradual change during which new species arise from older species. Evolutionary biologists study the evolution of living things in everything from the microscopic world to ecosystems. The evolution of various life forms on Earth can be summarized in a phylogenetic tree (Figure 1.17). A phylogenetic tree is a diagram showing the evolutionary relationships among biological species based on similarities and differences in genetic or physical traits or both. A phylogenetic tree is composed of nodes and branches. The internal nodes represent ancestors and are points in evolution when, based on scientific evidence, an ancestor is thought to have diverged to form two new species. The length of each branch is proportional to the time elapsed since the split. Q: What process of gradual change is the source of diversity of life on earth? Choices: - variation - creation - development - evolution A:
evolution
(Question)
Answer the following question given this paragraph: If you look at the map pictured below, you will see that the lithosphere is divided into plates ( Figure below ). There are a dozen major and several minor plates. Each plate is named for the continent or ocean basin it contains. Some plates are made of all oceanic lithosphere. A few are all continental lithosphere. But most plates are made of a combination of both. Notice the locations where the most earthquake epicenters are found. Q: Most plates are made up of a combination of what? Choices: - oceanic and reflective lithosphere - continental and battered lithosphere - continental and reflective lithosphere - continental and oceanic lithosphere A:
(Answer)
continental and oceanic lithosphere
Ques: Answer the following question given this paragraph: There are about 50,000 living species of vertebrates. They are placed in nine classes: five classes of fish plus amphibians, reptiles, birds, and mammals. Q: In addition to five classes of fish, what other classes make up the species of vertebrates? Choices: - amphibians , vertebrae , birds , and mammals - reptiles, birds, mammals, and primates - insects, amphibians, reptiles, and birds - amphibians, reptiles, birds, and mammals A:
Ans: amphibians, reptiles, birds, and mammals
(Q).
Answer the following question given this paragraph: According to the table, aluminum has an atomic number of 13. Therefore, every aluminum atom has 13 protons in its nucleus. Iron has an atomic number of 26. Therefore, every iron atom has 26 protons in its nucleus. Carbon has an atomic number of 6. Therefore, every carbon atom has 6 protons in its nucleus. Saylor URL: http://www. saylor. org/books. Q: According to the table, aluminum has an atomic number of 13. therefore, every aluminum atom has 13 protons in its what? Choices: - processes - membrane - components - nucleus A:
(A).
nucleus
Ques:Answer the following question given this paragraph: The sympathetic division controls internal organs and glands during emergencies. It prepares the body for fight or flight ( Figure below ). For example, it increases the heart rate and the flow of blood to the legs, so you can run away from danger. Q: What prepares the body for fight or flight during emergencies? Choices: - abnormal division - metabolic response - adrenal mechanism - sympathetic division A:

Ans:sympathetic division
Ques:Answer the following question given this paragraph: Ulna The ulna is the medial bone of the forearm. It runs parallel to the radius, which is the lateral bone of the forearm (Figure 8.6). The proximal end of the ulna resembles a crescent wrench with its large, C-shaped trochlear notch. This region articulates with the trochlea of the humerus as part of the elbow joint. The inferior margin of the trochlear notch is formed by a prominent lip of bone called the coronoid process of the ulna. Just below this on the anterior ulna is a roughened area called the ulnar tuberosity. To the lateral side and slightly inferior to the trochlear notch is a small, smooth area called the radial notch of the ulna. This area is the site of articulation between the proximal radius and the ulna, forming the proximal radioulnar joint. The posterior and superior portions of the proximal ulna make up the olecranon process, which forms the bony tip of the elbow. Q: What is the medial bone of the forearm that runs parallel to the radius? Choices: - humerus - fibula - radius - ulna A:

Ans:
ulna