Ques: Answer the following question given this paragraph: Respiratory tree: terminates in alveolus, alveoli. Respiratory bronchioles branch into alveolar ducts and into alveoli. Alveolus: microscopic air sacs, 300 million of these in human lungs. Total surface area large. Gas diffuses micrometer, very tiny distance. Nervous System Composed of tissues designed to integrate sensory information and direct a coordinated response to the environment. Basic unit of the nervous system is the neuron1 , a highly specialized cell that uses both electrical and chemical processes to communicate. Neurons "listen" to sensory organs or other neurons, and can simultaneously "hear" from 1 to hundreds of inputs simultaneously. Likewise, a neuron can "talk" to other neurons or cells that can create an action, like muscle cells or glands. Neurons are outnumbered in the nervous system by glia. Glia were once thought to only play a supportive role in helping neurons survive; today we know that they also are important participants in the communication process. Glial cells include astrocytes, ependymal cells, and a cell that has a macrophage like function. There are also oligodendocytes and Schwann cells that provide a myelin sheath. Q: Alveoli can be found in which organ in the human body? Choices: - Stomach - Liver - Heart - lungs A:
Ans: lungs

Ques: Answer the following question given this paragraph: Q: What is the process by which plants make their own food? Choices: - glycolysis - metabolism - cellular respiration - photosynthesis A:
Ans: photosynthesis

Ques: Answer the following question given this paragraph: A scuba diver, like the one in Figure below , releases air bubbles when he breathes under water. As he gets closer to the surface of the water, the air bubbles get bigger. Boyle's law explains why. The pressure of the water decreases as the diver gets closer to the surface. Because the bubbles are under less pressure, they increase in volume even though the amount of gas in the bubbles remains the same. Q: A diver's air bubbles increase in size as he approaches the surface because what decreases? Choices: - water direction - water weight - water energy - water pressure A:
Ans: water pressure

Ques: Answer the following question given this paragraph: Sunspots occur in pairs. Each is one side of a loop of the Sun's magnetic field on the Sun's surface. Sunspots come and go on an 11-year cycle. Q: In which way do sunspots occur? Choices: - by themselves - in fours - in threes - in pairs A:
Ans:
in pairs