Answer the following question given this paragraph: Q: What helps frogs swim during the tadpole phase? Choices: - fins - cilia - flagella - a tail A:
a tail
Answer the following question given this paragraph: Surface mining is used to obtain mineral ores that are near the surface. Blasting breaks up the soil and rocks that contain the ore. Enormous trucks haul the broken rocks to locations where the ores can be removed. Surface mining includes open-pit mining, quarrying, and strip mining. Q: What type pf mining is used to obtain mineral ores that are near the surface? Choices: - multi-layered mining - function mining - core mining - surface mining A:
surface mining
Q: Answer the following question given this paragraph: Some invertebrates evolved a rigid rod along the length of their body. This rod is called a notochord. You can see the notochord in the tunicates in Figure below . The notochord gives the body support and shape. It also provides a place for muscles to attach. It can counterbalance the pull of the muscles when they contract. Animals with a notochord are called chordates. All of them are placed in Phylum Chordata. Some early chordates eventually evolved into vertebrates. Q: A notochord has in common with what vertbrate structure? Choices: - trichord - rib cage - rip chord - spinal cord A:
A: spinal cord
Question: Answer the following question given this paragraph: Your immune system usually protects you from pathogens and keeps you well. However, like any other body system, the immune system itself can develop problems. Sometimes it responds to harmless foreign substances as though they were pathogens. Sometimes it attacks the body's own cells. Certain diseases can also attack and damage the immune system and interfere with its ability to defend the body. Q: What protects you from pathogens and keeps you healthy? Choices: - immunity system - health system - potent system - immune system A:
Answer: immune system
*Question*
Answer the following question given this paragraph: A wheel and axle is a simple machine that consists of two connected rings or cylinders, one inside the other. Both rings or cylinders turn in the same direction around a single center point. The inner ring or cylinder is called the axle, and the outer one is called the wheel. Besides the Ferris wheel, the doorknob in the Figure below is another example of a wheel and axle. For more examples, go to this URL:. Q: A doorknob and a ferris wheel are examples of what type of simple machine? Choices: - ball and socket - lever and pulley - ball and axle - wheel and axle A:
**Answer**
wheel and axle
(Question)
Answer the following question given this paragraph: Comets carry materials in from the outer solar system. Comets may have brought water into the early Earth. Other substances could also have come from comets. Q: What is rusting an example of? Choices: - radiation change - Decomposition - contamination change - chemical change A:
(Answer)
chemical change