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Questions in Grade High-school

[Homework Help] Identify two ways in which industrial development has affected ecosystems.

[Homework Help] Pick the answer that most likely represents the substances’ relative solubilities in water. A. CH₃CH₂CH₂CH₃ < CH₃CH₂CH₂OH < HOCH₂CH₂OH B. CH₃CH₂CH₂OH < CH₃CH₂CH₂CH₃ < HOCH₂CH₂OH C. CH₃CH₂CH₂CH₃ < HOCH₂CH₂OH < CH₃CH₂CH₂OH D. HOCH₂CH₂OH < CH₃CH₂CH₂OH < CH₃CH₂CH₂CH₃ E. HOCH₂CH₂OH < CH₃CH₂CH₂OH < CH₃CH₂CH₂CH₃

[Homework Help] Explain why the percentage of resistant bacteria increased over time.

[Homework Help] The central nervous system consists of: a. all the nervous tissue that lies outside the central nervous system. b. just your brain. c. just your spinal cord. d. your brain and spinal cord.

[Homework Help] The Indus, Ganges, and Brahmaputra were important to ancient India because they were: 1. High mountain ranges that protected India from invasion 2. Great rivers that flowed through India’s fertile northern plain 3. Aryan gods to whom the priests prayed for rain 4. Ruling dynasties that united the people of Harappa and Mohenjo-Daro

[Homework Help] Wastes are excreted from mollusks via the: a. outer shell b. nerve fibers c. radula d. nephridia

[Homework Help] The speed of light is about \(3.00 \times 10^5\) km/s. It takes approximately 1.28 seconds for light reflected from the moon to reach Earth. What is the average distance from Earth to the moon?

[Homework Help] In the 1940s and 1950s, scientists conducted experiments to determine the molecule responsible for heredity. Their experiments demonstrated that the molecule that encodes and transmits information in organisms is A. DNA. B. glucosamine. C. insulin. D. vitamin D.

[Homework Help] Mike can cut a 40-foot by 20-foot yard with a push mower in 25 minutes. At this rate, how many more minutes would it take him to cut a 40-foot by 30-foot yard?

[Homework Help] Which activity would most likely increase the mutation rate in a culture of bacteria being grown in a laboratory experiment? 1) Adding more distilled water to the culture 2) Adding excess nutrients to the culture 3) Exposing the culture to a higher concentration of CO2 4) Exposing the culture to ultraviolet radiation