Answer the following question given this paragraph: So far we have focused on traits due to one gene or several genes. But what about many genes? 100s or 1000s of genes? What would happen if an entire chromosome were missing or duplicated? What if a human had only 45 chromosomes? Or 47? This real possibility is usually due to mistakes during meiosis; the chromosomes do not fully separate from each other during sperm or egg formation. Specifically, nondisjunction is the failure of replicated chromosomes to separate during anaphase II. If a zygote forms from a gamete lacking a chromosome, a viable embryo cannot be produced. Most human abnormal chromosome numbers result in the death of the developing embryo, often before a woman even realizes she is pregnant. Occasionally, a zygote with an extra chromosome can become a viable embryo and develop. Q: If a human only has 45 chromosomes it is most likely due to a mistake during what? Choices: - testis - mitosis - plexus - meiosis A:
meiosis
Answer the following question given this paragraph: Freshwater marshes and swamps are characterized by slow and steady water flow. Bogs develop in depressions where water flow is low or nonexistent. Bogs usually occur in areas where there is a clay bottom with poor percolation. Percolation is the movement of water through the pores in the soil or rocks. The water found in a bog is stagnant and oxygen depleted because the oxygen that is used during the decomposition of organic matter is not replaced. As the oxygen in the water is depleted, decomposition slows. This leads to organic acids and other acids building up and lowering the pH of the water. At a lower pH, nitrogen becomes unavailable to plants. This creates a challenge for plants because nitrogen is an important limiting resource. Some types of bog plants (such as sundews, pitcher plants, and Venus flytraps) capture insects and extract the nitrogen from their bodies. Bogs have low net primary productivity because the water found in bogs has low levels of nitrogen and oxygen. Q: What develops in depressions where water flow is low or nonexistent? Choices: - swamps - ponds - sinkholes - bogs A:
bogs
Q: Answer the following question given this paragraph: The breasts are not directly involved in reproduction, but they nourish a baby after birth. Each breast contains mammary glands, which secrete milk. The milk drains into ducts leading to the nipple. A suckling baby squeezes the milk out of the ducts and through the nipple. Q: What glands in the breast secrete milk? Choices: - primordial glands - adrenal glands - fetal glands - mammary glands A:
A: mammary glands
Question: Answer the following question given this paragraph: Learn to balanced simple redox reactions by inspection. Learn to balance complex redox reactions by the half reaction method. Use the solvent, or parts of it, as a reactant or a product in balancing a redox reaction. Balancing simple redox reactions can be a straightforward matter of going back and forth between products and reactants. For example, in the redox reaction of Na and Cl2:. Q: Redox reactions, like other chemical reactions, begin with a product and end with what? Choices: - plasma - decomposition - stimulant - reactant A:
Answer: reactant
*Question*
Answer the following question given this paragraph: The proportionality between the rate and becomes an equal sign by the insertion of a constant . A rate law is an expression showing the relationship of the reaction rate to the concentrations of each reactant. The specific rate constant is the proportionality constant relating the rate of the reaction to the concentrations of reactants. The rate law and the specific rate constant for any chemical reaction must be determined experimentally. The value of the rate constant is temperature dependent. A large value of the rate constant means that the reaction is relatively fast, while a small value of the rate constant means that the reaction is relatively slow. Q: What is the term for an expression showing the relationship of the reaction rate to the concentrations of each reactant? Choices: - decay law - flow law - concentric law - rate law A:
**Answer**
rate law
Q: Answer the following question given this paragraph: Fossils may form in other ways. With complete preservation, the organism doesn't change much. As pictured below ( Figure below ), tree sap may cover an organism and then turn into amber . The original organism is preserved so that scientists might be able to study its DNA. Organisms can also be completely preserved in tar or ice. Q: Tree sap enclosing an organism in amber or an organism preserved in tar or ice are actually examples of what? Choices: - bones - corals - fuels - fossils A:
A: fossils