Answer the following question given this paragraph: A colloid is a homogeneous mixture with medium-sized particles. Examples include homogenized milk and gelatin. The particles of a colloid are large enough to reflect light, so you can see them. But they are too small to settle or filter out of the mixture. Q: A colloid is a homogeneous mixture with medium-sized what? Choices: - atoms - solutions - molecules - particles A:
particles
Answer the following question given this paragraph: Organisms that reproduce sexually by joining gametes , a process known as fertilization , must have a mechanism to produce haploid gametes. This mechanism is meiosis , a type of cell division that halves the number of chromosomes. Meiosis occurs only in gamete producing cells within the gonads. During meiosis the pairs of chromosomes separate and segregate randomly to produce gametes with one chromosome from each pair. Meiosis involves two nuclear and cell divisions without an interphase in between, starting with one diploid cell and generating four haploid cells ( Figure below ). Each division, named meiosis I and meiosis II, has four stages: prophase, metaphase, anaphase, and telophase. These stages are similar to those of mitosis, but there are distinct and important differences. Q: What is the process in which organisms reproduce sexually by joining gametes called? Choices: - propagation - migration - stimulation - fertilization A:
fertilization
Q: Answer the following question given this paragraph: Ulcers are sores in the lining of the stomach or duodenum that are usually caused by bacterial infections. They may also be caused by the acidic environment of the stomach. Stomach acids may damage the lining of the stomach. Symptoms typically include abdominal pain and bleeding. You can see how stomach ulcers develop at this link: http://www. youtube. com/watch?v=4bXZRgJ-1fk . Q: What are sores in the lining of the stomach or duodenum that are usually caused by bacterial infections or acidity? Choices: - lesions - clots - hernia - ulcers A:
A: ulcers
Question: Answer the following question given this paragraph: Insulin was the first human protein to be produced in this way. Insulin helps cells take up glucose from the blood. People with type 1 diabetes have a mutation in the gene that normally codes for insulin. Without insulin, their blood glucose rises to harmfully high levels. At present, the only treatment for type 1 diabetes is the injection of insulin from outside sources. Until recently, there was no known way to make insulin outside the human body. The problem was solved by gene cloning. The human insulin gene was cloned and used to transform bacterial cells, which could then produce large quantities of human insulin. Q: What helps cells take up glucose from the blood? Choices: - oxygen - hemoglobin - estrogen - insulin A:
Answer: insulin
*Question*
Answer the following question given this paragraph: The second major step is cytokinesis. As in prokaryotic cells, the cytoplasm must divide. Cytokinesis is the division of the cytoplasm in eukaryotic cells, resulting in two genetically identical daughter cells. Q: What is the name for the division of the cytoplasm in eukaryotic cells, resulting in two genetically identical daughter cells? Choices: - mitosis - vegetative division - metamorphosis - cytokinesis A:
**Answer**
cytokinesis
Answer the following question given this paragraph: levels. If a solid has a filled valence band with a relatively low-lying empty band above it (a conduction band), then electrons can be excited by thermal energy from the filled band into the vacant band where they can then migrate through the crystal, resulting in electrical conductivity. Electrical insulators are poor conductors because their valence bands are full. Semiconductors have electrical conductivities intermediate between those of insulators and metals. The electrical conductivity of semiconductors increases rapidly with increasing temperature, whereas the electrical conductivity of metals decreases slowly with increasing temperature. The properties of semiconductors can be modified by doping, or introducing impurities. Adding an element with more valence electrons than the atoms of the host populates the conduction band, resulting in an n-type semiconductor with increased electrical conductivity. Adding an element with fewer valence electrons than the atoms of the host generates holes in the valence band, resulting in a p-type semiconductor that also exhibits increased electrical conductivity. Q: What happens to the electrical conductivity of metals when placed in a pot of boiling water? Choices: - stays the same - increases slowly - increases quickly - decreases slowly A:
decreases slowly