Ques: Q: What do the ears have to be protected from in order to avoid hearing loss? Read this paragraph and choose the correct option from the provided answers: Hearing loss caused by loud sounds is permanent. However, this type of hearing loss can be prevented by protecting the ears from loud sounds. Choices: - Cold weather - Water - Storms - loud sounds A:
Ans: loud sounds

Ques: Q: The duodenum, the jejunum, and the ileum are the main regions of which organ? Read this paragraph and choose the correct option from the provided answers: 23.5 The Small and Large Intestines The three main regions of the small intestine are the duodenum, the jejunum, and the ileum. The small intestine is where digestion is completed and virtually all absorption occurs. These two activities are facilitated by structural adaptations that increase the mucosal surface area by 600-fold, including circular folds, villi, and microvilli. There are around 200 million microvilli per square millimeter of small intestine, which contain brush border enzymes that complete the digestion of carbohydrates and proteins. Combined with pancreatic juice, intestinal juice provides the liquid medium needed to further digest and absorb substances from chyme. The small intestine is also the site of unique mechanical digestive movements. Segmentation moves the chyme back and forth, increasing mixing and opportunities for absorption. Migrating motility complexes propel the residual chyme toward the large intestine. The main regions of the large intestine are the cecum, the colon, and the rectum. The large intestine absorbs water and forms feces, and is responsible for defecation. Bacterial flora break down additional carbohydrate residue, and synthesize certain vitamins. The mucosa of the large intestinal wall is generously endowed with goblet cells, which secrete mucus that eases the passage of feces. The entry of feces into the rectum activates the defecation reflex. Choices: - lungs - large intestine - heart - small intestine A:
Ans: small intestine

Ques: Q: What is the term for the method of sending out ultrasound waves to determine the locations of objects? Read this paragraph and choose the correct option from the provided answers: Animals such as bats and dolphins send out ultrasound waves and use their echoes, or reflected waves, to identify the locations of objects they cannot see. This is called echolocation. Animals use echolocation to find prey and avoid running into objects in the dark. You can see in the Figure below and also at the following URL how a bat uses echolocation to find insect prey. http://www. bsos. umd. edu/psyc/batlab/headaimmovies/nsf_challenge/nsf4. wmv. Choices: - catabolism - magnetism - morphology - echolocation A:
Ans: echolocation

Ques: Q: What is the name of the the most efficient possible engine? Read this paragraph and choose the correct option from the provided answers: An ideal engine, the most efficient theoretically possible, is called a Carnot Engine. Its efficiency is given by the following formula, where the temperatures are, respectively, the temperature of the exhaust environment and the temperature of the heat input, in Kelvins. In a Carnot engine heat is input and exhausted in isothermal cycles, and the efficiency is . In all real engines heat is lost to the environment, thus the ideal efficiency is never even close to being obtained. Choices: - excitation engine - diesel engine - ventilation engine - carnot engine A:
Ans:
carnot engine