Answer the following question given this paragraph: Anatomy of a Tooth The teeth are secured in the alveolar processes (sockets) of the maxilla and the mandible. Gingivae (commonly called the gums) are soft tissues that line the alveolar processes and surround the necks of the teeth. Teeth are also held in their sockets by a connective tissue called the periodontal ligament. The two main parts of a tooth are the crown, which is the portion projecting above the gum line, and the root, which is embedded within the maxilla and mandible. Both parts contain an inner pulp cavity, containing loose connective tissue through which run nerves and blood vessels. The region of the pulp cavity that runs through the root of the tooth is called the root canal. Surrounding the pulp cavity is dentin, a bone-like tissue. In the root of each tooth, the dentin is covered by an even harder bone-like layer called cementum. In the crown of each tooth, the dentin is covered by an outer layer of enamel, the hardest substance in the body (Figure 23.11). Although enamel protects the underlying dentin and pulp cavity, it is still nonetheless susceptible to mechanical and chemical erosion, or what is known as tooth decay. The most common form, dental caries (cavities) develops when colonies of bacteria feeding on sugars in the mouth release acids that cause soft tissue inflammation and degradation of the calcium crystals of the enamel. The digestive functions of the mouth are summarized in Table 23.4. Q: What secures teeth in the mouth? Choices: - plug - muscles - cartilage - socket A:
socket
(Question)
Answer the following question given this paragraph: Biological organization exists at all levels in organisms. It can be seen at the smallest level, in the molecules that make up such compounds as DNA and proteins, to the largest level, in an organism such as a blue whale, the largest mammal on Earth. Similarly, single celled prokaryotes and eukaryotes show order in the way their cells are arranged. Single-celled organisms such as an amoeba are free-floating and independent-living. Their single-celled "bodies" are able to carry out all the processes of life such as metabolism and respiration without help from other cells. Q: What is the largest mammal on earth? Choices: - tiger shark - water buffalo - giraffe - blue whale A:
(Answer)
blue whale
Ques: Answer the following question given this paragraph: Because electricity can be so dangerous, safety features are built into modern electric circuits and devices. They include three-prong plugs, circuit breakers, and GFCI outlets. You can read about these three safety features in the Figure below . You can learn more about electric safety features in the home by watching the video at this URL: http://www. dailymotion. com/video/x6fg5i_basics-of-your-home-s-electrical-sy_school . Q: Three-prong plugs, circuit breakers, and gfci outlets are safety features that recognize the danger of what? Choices: - heat - magnetism - gravity - electricity A:
Ans: electricity
(Q).
Answer the following question given this paragraph: The veins that return oxygen-poor blood to the heart are the superior vena cava and the inferior vena cava . The pulmonary veins return oxygen-rich blood from the lungs to the heart. The pulmonary veins are the only veins that carry oxygen-rich blood. Q: The superior vena cava and the inferior vena cava are veins that return blood lacking what to the heart? Choices: - hemoglobin - carbon dioxide - nitrogen - oxygen A:
(A).
oxygen
Ques:Answer the following question given this paragraph: The energy for photosynthesis comes from light. Without light energy, photosynthesis cannot occur. As you can see in the Figure below , plants can get the energy they need for photosynthesis from either sunlight or artificial light. Q: What is the source of energy for photosynthesis? Choices: - air - gravity - carbon - light A:

Ans:light
Ques:Answer the following question given this paragraph: A virus is a sub-microscopic particle that can infect living cells. Viruses are much smaller than prokaryotic organisms. In essence, a virus is simply a nucleic acid surrounded by a protein coat, as seen in the Figure below . This outer coat is called a capsid . Viruses will be discussed in more detail in the Viruses concepts. Q: In essence, a virus is simply a nucleic acid surrounded by what? Choices: - a membrane coat - a polymer coat - a polypeptide - a protein coat A:

Ans:
a protein coat