Answer the following question given this paragraph: As the temperature of a perfect crystal increases, its particles start to vibrate slightly around their optimal positions, thus increasing the entropy of the system. The dependence of entropy on temperature varies by substance, so the only temperature at which all crystals have the same entropy is absolute zero. The standard entropy of a substance is a measure of its entropy at 25C and 1 atm of pressure. Like standard enthalpy of formation values, standard entropies are tabulated for a wide range of substances. However, unlike enthalpy of formation values, all standard entropy values are positive, because the absolute zero for entropy is the most ordered possible state. Additionally, this means that pure elements in their standard states do not have a standard entropy of zero. Q: The measure of a substances entropy at 25 degrees celsius is known as it's? Choices: - specific entropy - new entropy - limited entropy - standard entropy A:
standard entropy
(Question)
Answer the following question given this paragraph: When a blood vessel gets clogged, there is no medical equivalent of "Drano" that will clear it out. There is, however, a procedure known as angioplasty. A thin tube with a balloon is threaded through the blood vessels. Once in place, the balloon is inflated to compress the clog against the artery wall. Q: The procedure known as angioplasty is used when what part of the circulatory system is clogged? Choices: - lungs - the heart - the spinal cord - blood vessel A:
(Answer)
blood vessel
Ques: Answer the following question given this paragraph: HIV spreads through contact between an infected person's body fluids and another person's bloodstream or mucus membranes, which are found in the mouth, nose, and genital areas. Body fluids that may contain HIV are blood, semen, vaginal fluid, and breast milk. The virus can spread through sexual contact or shared drug needles. It can also spread from an infected mother to her baby during childbirth or breastfeeding. Saliva can carry the HIV virus, but it won't spread it, unless the saliva gets into the bloodstream. Other body fluids such as urine and sweat do not contain the virus. HIV does not spread in any fluid in which the host cells cannot survive. Q: Saliva can carry the hiv virus, but it won't spread it, unless the saliva gets into what? Choices: - lungs - kidneys - liver - bloodstream A:
Ans: bloodstream
(Q).
Answer the following question given this paragraph: Q: The total energy assimilated by an ecosystem in a give period is known as what? Choices: - size primary production - median primary production - mean primary production - gross primary production A:
(A).
gross primary production
Ques:Answer the following question given this paragraph: CHAPTER REVIEW 17.1 An Overview of the Endocrine System The endocrine system consists of cells, tissues, and organs that secrete hormones critical to homeostasis. The body coordinates its functions through two major types of communication: neural and endocrine. Neural communication includes both electrical and chemical signaling between neurons and target cells. Endocrine communication involves chemical signaling via the release of hormones into the extracellular fluid. From there, hormones diffuse into the bloodstream and may travel to distant body regions, where they elicit a response in target cells. Endocrine glands are ductless glands that secrete hormones. Many organs of the body with other primary functionssuch as the heart, stomach, and kidneysalso have hormone-secreting cells. Q: The endocrine system consists of cells, tissues, and organs that secrete what critical to homeostasis? Choices: - antibodies - acids - saliva - hormones A:

Ans:hormones
Ques: Answer the following question given this paragraph: Plants have specialized organs that help them survive and reproduce in a great diversity of habitats. Major organs of most plants include roots, stems, and leaves. Leaves are the keys not only to plant life but to all terrestrial life. The primary role of leaves is to collect sunlight and make food by photosynthesis . Despite the fundamental importance of the work they do, there is great diversity in the leaves of plants. However, given the diversity of habitats in which plants live, it's not surprising that there is no single best way to collect solar energy for photosynthesis. Q: The primary role of leaves is to collect what? Choices: - pollen - insects - precipitation - sunlight A:
Ans:
sunlight