Answer the following question given this paragraph: The male reproductive system forms before birth but does not become capable of reproduction until it matures during puberty. Puberty lasts from about ages 12 to 18 years and is controlled by hormones. Q: What stage in human males lasts from about ages 12 to 18 years and is controlled by hormones? Choices: - childhood - adolescence - maturity - puberty A:
puberty
Answer the following question given this paragraph: Q: Sediments in oligotrophic lakes contain large amounts of what? Choices: - algae - fertilizer - igneous rocks - decomposable organic matter A:
decomposable organic matter
Q: Answer the following question given this paragraph: Defecating, urination, and even childbirth involve cooperation between the diaphragm and abdominal muscles (this cooperation is referred to as the "Valsalva maneuver"). You hold your breath by a steady contraction of the diaphragm; this stabilizes the volume and pressure of the peritoneal cavity. When the abdominal muscles contract, the pressure cannot push the diaphragm up, so it increases pressure on the intestinal tract (defecation), urinary tract (urination), or reproductive tract (childbirth). The inferior surface of the pericardial sac and the inferior surfaces of the pleural membranes (parietal pleura) fuse onto the central tendon of the diaphragm. To the sides of the tendon are the skeletal muscle portions of the diaphragm, which insert into the tendon while having a number of origins including the xiphoid process of the sternum anteriorly, the inferior six ribs and their cartilages laterally, and the lumbar vertebrae and 12th ribs posteriorly. The diaphragm also includes three openings for the passage of structures between the thorax and the abdomen. The inferior vena cava passes through the caval opening, and the esophagus and attached nerves pass through the esophageal hiatus. The aorta, thoracic duct, and azygous vein pass through the aortic hiatus of the posterior diaphragm. Q: Defecating, urination, and even childbirth involve cooperation between the diaphragm and these? Choices: - heart muscles - skeletal muscles - lung muscles - abdominal muscles A:
A: abdominal muscles
Question: Answer the following question given this paragraph: The control rods play an important role in the modulation of the nuclear chain reaction (usually a collision of a neutron with uranium). Each collision produces more neutrons than were present initially. If left unsupervised, the reaction would soon get out of control. Rods are commonly made of boron or a number of metals and metal alloys. The purpose of the control rods is to absorb neutrons to regulate the rate of the chain reaction so that the water does not overheat and destroy the reactor. Q: What play an important role in the modulation of the nuclear chain reaction? Choices: - radiation rods - control neutrons - particle rods - control rods A:
Answer: control rods
*Question*
Answer the following question given this paragraph: Light may be absorbed by matter. This is called absorption of light. When light is absorbed, it doesn't reflect from or pass through matter. Instead, its energy is transferred to particles of matter, which may increase the temperature of matter. Q: When light is absorbed by a material, what may increase? Choices: - happiness - weight - mass - its temperature A:
**Answer**
its temperature
Answer the following question given this paragraph: Taste receptors are found in tiny bumps on the tongue called taste buds (see Figure below ). There are separate taste receptors for sweet, salty, sour, bitter, and meaty tastes. The meaty taste is called umami . You can learn more about taste receptors and the sense of taste by watching the animation at the following link: http://www. bbc. co. uk/science/humanbody/body/factfiles/taste/taste_ani_f5. swf . Q: What are the taste receptors found as tiny bumps on the tongue called? Choices: - ear buds - fat buds - hard buds - taste buds A:
taste buds