Answer:
C
Explanation:
The complete question: A student conducts an experiment to see how music affects plant growth. The student obtains four identical plants. Each one is potted in the same type of soil and receives the same amount of sunlight and water each day. Plant A listens to classical music for three hours each day. Plant B listens to rock music for three hours each day. Plant C listens to country music for three hours each day. Plant D does not listen to any music at all. In the experiment described in the scenario, which group represents the control group? A. Plant B B. Plant A C. Plant D D. Plant C?
<u>The control group here would be plant D.</u>
Control groups are usually used to minimize the effects of extraneous variables in the course of experiments and to ensure that the differences observed in different experimental groups are due to the effects of the independent variables.
<em>In this case, all the plants were exposed to music except the control group because the aim of the experiment is to measure the effects of music on plant growth. Any difference in growth observed between those exposed to music and the control group can reliably be considered to be due to the music.</em>
The correct option is C.
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Answer: <u><em>
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Explanation:
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Climate change is the greatest global threat to coral reef ecosystems. Scientific evidence now clearly indicates that the Earth's atmosphere and ocean are warming, and that these changes are primarily due to greenhouse gases derived from human activities.
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As temperatures rise, mass coral bleaching events and infectious disease outbreaks are becoming more frequent. Additionally, carbon dioxide absorbed into the ocean from the atmosphere has already begun to reduce calcification rates in reef-building and reef-associated organisms by altering seawater chemistry through decreases in pH. This process is called ocean acidification.
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Climate change will affect coral reef ecosystems, through sea level rise, changes to the frequency and intensity of tropical storms, and altered ocean circulation patterns. When combined, all of these impacts dramatically alter ecosystem function, as well as the goods and services coral reef ecosystems provide to people around the globe.
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The group one element (alkali metal) element that is lithium, sodium,potassium, Rubidium,Caesium and Francium and halogen (the group 17 elements) that is fluorine, chlorine,bromine,iodine, astatine are the one which are found in nature only in compounds. The two families are highly reactive element.
Answer:
The correct answer is the cerebellum.
Explanation:
The cerebellum is one of the major parts or regions of the brain. The cerebellum receives messages from the spinal cord, sensory system, and several parts of the brain and then controls motor movements.
The cerebellum assists several functions and voluntary movements such as maintain balance, coordination between different parts of the body, and speech, eye movements, bodily sensations, and other essential functions.
Thus, the correct answer is the cerebellum.