Answer the following question given this paragraph: The plasma membrane is composed mainly of phospholipids, which consist of fatty acids and alcohol. The phospholipids in the plasma membrane are arranged in two layers, called a phospholipid bilayer . As shown in Figure below , each phospholipid molecule has a head and two tails. The head "loves" water (hydrophilic) and the tails "hate" water (hydrophobic). The water-hating tails are on the interior of the membrane, whereas the water-loving heads point outwards, toward either the cytoplasm or the fluid that surrounds the cell. Q: What is the plasma membrane mainly composed of? Choices: - filaments - antibodies - carbon - phospholipids A:
phospholipids
(Question)
Answer the following question given this paragraph: 5. Anthracite is the hardest type of coal because it is metamorphic. Anthracite causes less pollution when it burns. Why do you think that is?. Q: What is the hardest type of coal? Choices: - Bituminous - lignite - peat - anthracite A:
(Answer)
anthracite
Ques: Answer the following question given this paragraph: Let's take a closer look at a molecule of ATP. Although it carries less energy than glucose, its structure is more complex. "A" in ATP refers to the majority of the molecule adenosine a combination of a nitrogenous base and a five-carbon sugar. "T" and "P" indicate the three phosphates, linked by bonds which hold the energy actually used by cells. Usually, only the outermost bond breaks to release or spend energy for cellular work. Q: The a in atp is short for what? Choices: - amino - acetic - acid - adenosine A:
Ans: adenosine
(Q).
Answer the following question given this paragraph: Ionic bonds form only between metals and nonmetals. Metals "want" to give up electrons, and nonmetals "want" to gain electrons. Find sodium (Na) in Figure below . Sodium is an alkali metal in group 1. Like other group 1 elements, it has just one valence electron. If sodium loses that one electron, it will have a full outer energy level. Now find fluorine (F) in Figure below . Fluorine is a halogen in group 17. It has seven valence electrons. If fluorine gains one electron, it will have a full outer energy level. After sodium gives up its valence electron to fluorine, both atoms have a more stable arrangement of electrons. Q: What type of bonds form only between metals and nonmetals? Choices: - non-harmonic bonds - harmonic bonds - magnetic bonds - ionic bonds A:
(A).
ionic bonds
Ques:Answer the following question given this paragraph: Naming anions is slightly different than naming cations. The ending of the element's name is dropped and replaced with the ide suffix. For example, F - is the fluoride ion, while O 2- is the oxide ion. As is the case with cations, the charge on the anion is indicated by a superscript following the symbol. Common anions are listed in the Table below :. Q: When naming this type of ion the ending of the element's name is dropped and replaced with the ide suffix? Choices: - amines - oxides - cations - anions A:

Ans:anions
Ques:Answer the following question given this paragraph: Salamanders are found in most moist or arid habitats in the Northern Hemisphere, but can also be found south of the equator. They live on all continents except Antarctica and Australia. Salamanders live in or near water or on moist ground, often in a swamp. Some species live in water most of their life, some live their entire adult life on land, and some live in both habitats. Some salamanders live in caves. These salamanders have pale skin and reduced eyes as they have adapted to living in complete darkness in underground pools of water. The reduced eyes are similar to other organisms that live in caves or underground. Q: Pale skin and reduced eyes in salamanders that live in dark caves are an example of what? Choices: - interpretation - reproduction - expansion - adaptations A:

Ans:
adaptations