Answer the following question given this paragraph: Some parasites kill their host, but most do not. It's easy to see why. If a parasite kills its host, the parasite is also likely to die. Instead, parasites usually cause relatively minor damage to their host. Q: What is likely to happen to a parasite if it kills its host? Choices: - it thrives - it adapts - it mutates - it dies A:
it dies
(Question)
Answer the following question given this paragraph: Infectious diseases are diseases that spread from person to person. They are caused by pathogens such as bacteria, viruses or fungi. What can you do to avoid infectious diseases? Eating right and getting plenty of sleep are a good start. These habits will help keep your immune system healthy. With a healthy immune system, you will be able to fight off many pathogens. The next best way is to avoid pathogens. Though this is difficult, there are steps you can take to limit your exposure to pathogens. Q: What system is responsible for defending your body against sickness? Choices: - nervous system - circulatory system - digestion system - immune system A:
(Answer)
immune system
Ques: Answer the following question given this paragraph: Smoking is the most significant cause of respiratory disease as well as cardiovascular disease and cancer. Exposure to tobacco smoke by smoking or by breathing air that contains tobacco smoke is the leading cause of preventable death in the United States. Regular smokers die about 10 years earlier than nonsmokers. The Centers for Disease Control and Prevention (CDC) describes tobacco use as "the single most important preventable risk to human health in developed countries and an important cause of [early] death worldwide. ". Q: What is the most significant cause of respiratory disease as well as cardiovascular disease and cancer? Choices: - sleeping - running - driving - smoking A:
Ans: smoking
(Q).
Answer the following question given this paragraph: Each pollen grain has two coverings: the exine (thicker, outer layer) and the intine (Figure 32.7). The exine contains sporopollenin, a complex waterproofing substance supplied by the tapetal cells. Sporopollenin allows the pollen to survive under unfavorable conditions and to be carried by wind, water, or biological agents without undergoing damage. Female Gametophyte (The Embryo Sac) While the details may vary between species, the overall development of the female gametophyte has two distinct phases. First, in the process of megasporogenesis, a single cell in the diploid megasporangiuman area of tissue in the ovulesundergoes meiosis to produce four megaspores, only one of which survives. During the second phase, megagametogenesis, the surviving haploid megaspore undergoes mitosis to produce an eight-nucleate, seven-cell female gametophyte, also known as the megagametophyte or embryo sac. Two of the nucleithe polar nucleimove to the equator and fuse, forming a single, diploid central cell. This central cell later fuses with a sperm to form the triploid endosperm. Three nuclei position themselves on the end of the embryo sac opposite the micropyle and develop into the antipodal cells, which later degenerate. The nucleus closest to the micropyle becomes the female gamete, or egg cell, and the two adjacent nuclei develop into synergid cells (Figure 32.8). The synergids help guide the pollen tube for successful fertilization, after which they disintegrate. Once fertilization is complete, the resulting diploid zygote develops into the embryo, and the fertilized ovule forms the other tissues of the seed. Q: Each pollen grain has two coverings: the exine (thicker, outer layer) and the what? Choices: - tube nucleus - pollen tube - cytoplasm - intine A:
(A).
intine
Ques:Answer the following question given this paragraph: Aldehydes, ketones, carboxylic acids, esters, and ethers h ave oxygencontaining functional groups. Q: Aldehydes, ketones, carboxylic acids, esters, and ethers all have functional groups containing what element? Choices: - silicon - methane - carbon - oxygen A:

Ans:oxygen
Answer the following question given this paragraph: The reverse reaction (amide hydrolysis) is very useful in the study of protein structure. Proteins are long chains of amino acids (each amino acid contains an amine group and a carboxyl group, both attached to a central carbon atom). The amino acids are linked together by amide bonds to form the long protein chain. One of the techniques for looking at protein structure is to break those amide linkages so we can learn the identity of the amino acids in the chain. We do this through a hydrolysis reaction:. Q: What are long chains of amino acids? Choices: - lipids - Fatty Acid Chains - cells - proteins A:
proteins