Answer the following question given this paragraph: Figure below shows how phospholipid molecules are arranged in a cell membrane. One end (the head) of each phospholipid molecule is polar and attracts water. This end is called hydrophilic ("water loving"). The other end (the tail) is nonpolar and repels water. This end is called hydrophobic ("water hating"). The nonpolar tails are on the inside of the membrane. The polar heads are on the outside of the membrane. These differences in polarity allow some molecules to pass through the membrane while keeping others out. You can see how this works in the video at the URL below. Q: The end of the phospholipid molecule that is polar and attracts water is called what? Choices: - cytosolic - hydrophobic - magnetic - hydrophilic A:
hydrophilic
(Question)
Answer the following question given this paragraph: In conduction , heat is transferred from molecule to molecule by contact. Warmer molecules vibrate faster than cooler ones. They bump into the cooler molecules. When they do, they transfer some of their energy. Conduction happens mainly in the lower atmosphere. Can you explain why?. Q: In which area does conduction mainly happen? Choices: - higher atmosphere - thermosphere - mesosphere - lower atmosphere A:
(Answer)
lower atmosphere
Ques: Answer the following question given this paragraph: Proteins in the diet are necessary for life. Dietary proteins are broken down into their component amino acids when food is digested. Cells can then use the components to build new proteins. Humans are able to synthesize all but nine of the twenty common amino acids. These nine amino acids, called essential amino acids , must be consumed in foods. Like dietary carbohydrates and lipids, dietary proteins can also be broken down to provide cells with energy. The amino acids regarded as essential for humans are phenylalanine, valine, threonine, tryptophan, isoleucine, methionine, leucine, lysine, and histidine. Additionally, cysteine, tyrosine and arginine are required by infants and growing children. Q: Dietary proteins are broken down into what components when food is digested? Choices: - organic acids - protein acids - polymer acids - amino acids A:
Ans: amino acids
(Q).
Answer the following question given this paragraph: Watch this animation (http://openstaxcollege. org/l/sintestine) that depicts the structure of the small intestine, and, in particular, the villi. Epithelial cells continue the digestion and absorption of nutrients and transport these nutrients to the lymphatic and circulatory systems. In the small intestine, the products of food digestion are absorbed by different structures in the villi. Which structure absorbs and transports fats?. Q: Which cells continue the digestion and absorption of nutrients and transport these nutrients to the lymphatic and circulatory systems? Choices: - myocyte - blood cells - neurons - epithelial cells A:
(A).
epithelial cells
Ques:Answer the following question given this paragraph: The drummer in Figure below is hitting the drumheads with drumsticks. This causes the drumheads to vibrate. The vibrations pass to surrounding air particles and then from one air particle to another in a wave of energy called sound energy . We hear sound when the sound waves reach our ears. Sound energy can travel through air, water, and other substances, but not through empty space. That's because the energy needs particles of matter to pass it on. Q: What energy, produced by vibrations, cannot travel through empty space? Choices: - light - heat - plasma - sound A:

Ans:sound
Answer the following question given this paragraph: Amphibians reproduce sexually with either external or internal fertilization. They may attract mates with calls or scents. They do not produce amniotic eggs, so they must reproduce in water. Their larvae go through metamorphosis to change into the adult form. Q: Through what method or methods of fertilization do amphibians sexually reproduce? Choices: - asexual or sexual - mitosis and meiosis - spawning or budding - external or internal A:
external or internal