Q: What ensures that seeds germinate only when conditions for seedling survival are optimal? Read this paragraph and choose the correct option from the provided answers: Choices: - germination dormancy - seed forcing - survival dormancy - seed dormancy A:
seed dormancy

(Question)
Q: What term means the amount of a substance required to form a saturated solution in a given amount of solvent at a specified temperature? Read this paragraph and choose the correct option from the provided answers: The solubility of a substance is the amount of that substance that is required to form a saturated solution in a given amount of solvent at a specified temperature. Solubility is often measured as the grams of solute per 100 g of solvent. The solubility of sodium chloride in water is 36.0 g per 100 g water at 20C. The temperature must be specified because solubility varies with temperature. For gases, the pressure must also be specified. Solubility is specific for a particular solvent. We will consider solubility of material in water as solvent. Choices: - viscosity - concentration - turbidity - solubility A:
(Answer)
solubility

Ques: Q: What weak base is applied as an agricultural fertilizer in its pure form and is diluted to make a household cleanser? Read this paragraph and choose the correct option from the provided answers: Figure 4.7 Ammonia is a weak base used in a variety of applications. (a) Pure ammonia is commonly applied as an agricultural fertilizer. (b) Dilute solutions of ammonia are effective household cleansers. (credit a: modification of work by National Resources Conservation Service; credit b: modification of work by pat00139). Choices: - vinegar - nitrogen - carbon monoxide - ammonia A:
Ans: ammonia

(Q).
Q: Water and many metals are materials that have low resistance to electric currents and are therefore known as what? Read this paragraph and choose the correct option from the provided answers: Materials that have low resistance to electric current are called electric conductors . Many metalsincluding copper, aluminum, and steelare good conductors of electricity. Water that has even a tiny amount of impurities in it is an electric conductor as well. Choices: - radioactive - good insulators - electromagnets - electric conductors A:
(A).
electric conductors

Ques:Q: What is only effective if ventilation is matched to blood flow through alveolar capillaries? Read this paragraph and choose the correct option from the provided answers: Choices: - iron lung - blood pressur control - assisted breathing - breathing control A:

Ans:breathing control

Q: Alzheimers disease is associated with memory loss in what group of people? Read this paragraph and choose the correct option from the provided answers: One useful application of PET scanning is in the diagnosis of Alzheimer's disease. This debilitating condition associated with memory loss primarily occurs in elderly individuals. A protein known as beta-amyloid gradually forms deposits, or plaques, in the brain. Severe memory loss and impaired movement appear to be direct results of the plaque growth. Choices: - juveniles - prehistoric - immigrants - elderly A:
elderly