Answer the following question given this paragraph: Gas exchange is the movement of oxygen into the blood and carbon dioxide out of the blood. Q: In gas exchange, oxygen flows into the blood, and what flows out? Choices: - naturally dioxide - carbon monoxide - liquid dioxide - carbon dioxide A:
carbon dioxide
(Question)
Answer the following question given this paragraph: Kidneys: The Main Osmoregulatory Organ The kidneys, illustrated in Figure 41.4, are a pair of bean-shaped structures that are located just below and posterior to the liver in the peritoneal cavity. The adrenal glands sit on top of each kidney and are also called the suprarenal glands. Kidneys filter blood and purify it. All the blood in the human body is filtered many times a day by the kidneys; these organs use up almost 25 percent of the oxygen absorbed through the lungs to perform this function. Oxygen allows the kidney cells to efficiently manufacture chemical energy in the form of ATP through aerobic respiration. The filtrate coming out of the kidneys is called urine. Q: The kidneys are a pair of bean-shaped structures that are located just below and posterior to the liver in this? Choices: - stomach cavity - cerebral cavity - mantle cavity - peritoneal cavity A:
(Answer)
peritoneal cavity
Ques: Answer the following question given this paragraph: Draw the Lewis electron dot diagram for each substance. Double or triple bonds may be needed. Q: What structure shows the bonding between atoms, with dots representing available electrons? Choices: - Mendelian model - Pascal model - string theory - lewis structure A:
Ans: lewis structure
(Q).
Answer the following question given this paragraph: Oxygen has increased in the atmosphere throughout the history of the earth. Note the logarithmic scale, which indicates great increases after first photosynthesis (in bacteria) and then land plants evolved. Related geological events: A = no oxidized iron; B = oxidized iron bands in seabed rock - evidence for O 2 in the oceans; C = oxidized iron bands on land and ozone layer formation- evidence for O 2 in the atmosphere. Q: What has increased in the atmosphere throughout the history of the earth? Choices: - nitrogen - wind - carbon - oxygen A:
(A).
oxygen
Ques:Answer the following question given this paragraph: Stem Cell Research Stem cell research aims to find ways to use stem cells to regenerate and repair cellular damage. Over time, most adult cells undergo the wear and tear of aging and lose their ability to divide and repair themselves. Stem cells do not display a particular morphology or function. Adult stem cells, which exist as a small subset of cells in most tissues, keep dividing and can differentiate into a number of specialized cells generally formed by that tissue. These cells enable the body to renew and repair body tissues. The mechanisms that induce a non-differentiated cell to become a specialized cell are poorly understood. In a laboratory setting, it is possible to induce stem cells to differentiate into specialized cells by changing the physical and chemical conditions of growth. Several sources of stem cells are used experimentally and are classified according to their origin and potential for differentiation. Human embryonic stem cells (hESCs) are extracted from embryos and are pluripotent. The adult stem cells that are present in many organs and differentiated tissues, such as bone marrow and skin, are multipotent, being limited in differentiation to the types of cells found in those tissues. The stem cells isolated from umbilical cord blood are also multipotent, as are cells from deciduous teeth (baby teeth). Researchers have recently developed induced pluripotent stem cells (iPSCs) from mouse and human adult stem cells. These cells are genetically reprogrammed multipotent adult cells that function like embryonic stem cells; they are capable of generating cells characteristic of all three germ layers. Because of their capacity to divide and differentiate into specialized cells, stem cells offer a potential treatment for diseases such as diabetes and heart disease (Figure 3.36). Cell-based therapy refers to treatment in which stem cells induced to differentiate in a growth dish are injected into a patient to repair damaged or destroyed cells or tissues. Many obstacles must be overcome for the... Q: Found in cord blood and other sources, what kind of cells hold the promise of renewing and repairing body tissues? Choices: - red blood cells - white blood cells - neurons - stem cells A:

Ans:stem cells
Question: Answer the following question given this paragraph: Cratonic rocks contain rounded sedimentary grains. Rounded grains indicate that the minerals eroded from an earlier rock. It also means that rivers or seas existed. Q: Rounded grains indicate that the minerals eroded from what? Choices: - iron - fossils - recent rock - earlier rock A:
Answer:
earlier rock