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? A:

OPTIONS:
- Mendelian model
- Pascal model
- string theory
- lewis structure

Answer: lewis structure

Problem: OPTIONS:
- nitrogen
- wind
- carbon
- oxygen
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? A:
Answer: oxygen

Problem:OPTIONS:
- red blood cells
- white blood cells
- neurons
- stem cells

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? A:
****
A: stem cells

Answer the following question given this paragraph: An ecosystem consists of all the biotic and abiotic factors in an area and their interactions. A niche refers to the role of a species in its ecosystem. A habitat is the physical environment in which a species lives and to which it is adapted. Two different species cannot occupy the same niche in the same place for very long. Q: What do you call the physical environment in which a species lives and to which it is adapted? A:
OPTIONS:
- domain
- environment
- ecosystem
- habitat
habitat

Answer the following question given this paragraph: Eukaryotic cell division involves mitosis and cytokinesis. Q: Eukaryotic cell division involves mitosis and what? A:
OPTIONS:
- meiosis
- electrolysis
- spermatogenesis
- cytokinesis

Answer: cytokinesis

input with options: Answer the following question given this paragraph: Monosaccharides can be linked together to form disaccharides or polysaccharides. Q: What can be linked together to form disaccharides or polysaccharides? A:
OPTIONS:
- amino acids
- carbohydrates
- nitrates
- monosaccharides
output:
monosaccharides