Q: What do we call the worldwide radio-navigation system formed from a constellation of 24 satellites and their ground stations? Read this paragraph and choose the correct option from the provided answers: You must have a GPS receiver to use the system. You can buy many types of these in stores. The GPS receiver detects radio signals from nearby GPS satellites. There are precise clocks on each satellite and in the receiver. The receiver measures the time for radio signals from satellites to reach it. The receiver uses the time and the speed of radio signals to calculate the distance between the receiver and the satellite. The receiver does this with at least four different satellites to locate its position on the Earth's surface ( Figure above ). GPS receivers are now being built into many items, such as cell phones and cars. Choices: - cellular network - radio waves - compass - gps A:
gps

(Question)
Q: Which leukocytes are first to respond to bacterial infections? Read this paragraph and choose the correct option from the provided answers: 18.4 Leukocytes and Platelets Leukocytes function in body defenses. They squeeze out of the walls of blood vessels through emigration or diapedesis, then may move through tissue fluid or become attached to various organs where they fight against pathogenic organisms, diseased cells, or other threats to health. Granular leukocytes, which include neutrophils, eosinophils, and basophils, originate with myeloid stem cells, as do the agranular monocytes. The other agranular leukocytes, NK cells, B cells, and T cells, arise from the lymphoid stem cell line. The most abundant leukocytes are the neutrophils, which are first responders to infections, especially with bacteria. About 2030 percent of all leukocytes are lymphocytes, which are critical to the body's defense against specific threats. Leukemia and lymphoma are malignancies involving leukocytes. Platelets are fragments of cells known as megakaryocytes that dwell within the bone marrow. While many platelets are stored in the spleen, others enter the circulation and are essential for hemostasis; they also produce several growth factors important for repair and healing. Choices: - chemocytes - erythrocytes - microcytes - neutrophils A:
(Answer)
neutrophils

Ques: Q: Why wouldn't a teakettle have an aluminum handle? Read this paragraph and choose the correct option from the provided answers: This teakettle is made of aluminum except for its handle, which is made of plastic. Aluminum is a good conductor of heat. It conducts heat from the flames on the range to the water inside the kettle, so the water heats quickly. Plastic, on the other hand, is not a good conductor of heat. It stays cool enough to touch even when the rest of the teakettle becomes very hot. Choices: - it absorbs light - it isn't washable - it is magnetic - it conducts heat A:
Ans: it conducts heat

(Q).
Q: The different types of what systems work together to carry out all the life functions of the individual? Read this paragraph and choose the correct option from the provided answers: Organ systems are organized into the organism. The different organ systems work together to carry out all the life functions of the individual. For example, cardiovascular and respiratory systems work together to provide the individual with oxygen and rid it of carbon dioxide. Choices: - maturation systems - digestive systems - heartbeat systems - organ systems A:
(A).
organ systems

Ques:Q: Which human body system controls the amount of water in the body and removes wastes? Read this paragraph and choose the correct option from the provided answers: The urinary system controls the amount of water in the body and removes wastes. Any problem with the urinary system can also affect many other body systems. Choices: - lymphatic system - mucous system - digestive system - urinary system A:

Ans:urinary system

Ques: Q: If an elephant and a boy are falling towards the ground, who will land first? Read this paragraph and choose the correct option from the provided answers: Both the elephant and the boy are falling to the ground because of gravity. The force of gravity (F grav ) is greater for the elephant than it is for the boy because the elephant is much more massive. Nonetheless, both of them will reach the ground at the same time (assuming they fall from the same height at the same time and there is no air resistance. ). Choices: - the boy - neither will land - the elephant - both same time A:
Ans:
both same time