Your best answer is C. catalyst can reduce the amount of energy needed for a chemical reaction to take place.
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When light is refracted
A. it keeps moving in the same direction as it passes into a new medium.
B. it is absorbed as it strikes the surface of a new medium.
C. it changes it direction and stays in the same medium.
D. it changes its direction as it passes into a new medium.
Answer:
d
Explanation:
Answer:
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Which taxonomic category is made up of several classes?
The scheme of modern taxonomy goes:
Life > Domain > Kingdom > Phylum > Class > Order > Family > Genus > Species
So, a PHYLUM is made of several classes.
In taxonomic categories, family is made up of several classes.
Explanation:Taxonomic classification is a way in biology to group different organism on the basis of some characteristics.On this bases there are Some categories in taxonomic classification:Kingdom > Phylum > Class > Order > Family > Genus > Species.From left to right categories are on the basis of much specialized and specified characteristics.So according to above categories, different classes are present in family.An ATP molecule is made up of which of the following? Select one: a. Carboxylic group, ribose sugar, adenine base b. Phosphate groups, deoxyribose sugar, thymine base c. Phosphate groups, ribose sugar, adenine base
Final answer:
ATP is composed of a ribose sugar, an adenine base, and three phosphate groups. It is a high-energy molecule essential for various biological processes, and the correct structural components correspond to choice 'c' in the question.
Explanation:
An ATP molecule is composed of a ribose sugar, an adenine base, and three phosphate groups. These three parts amalgamate to form the nucleotide known as adenosine triphosphate (ATP), which plays a crucial role as an energy currency within the cell. ATP is considered a high-energy compound because of the considerable potential energy stored in the covalent bonds that link the trio of phosphate groups together. When these bonds are broken in a process called hydrolysis, a significant amount of energy is released that helps to power various cellular activities, ranging from muscle contraction to biochemical synthesis.
The correct answer to the question, which asks for the components making up an ATP molecule, is 'c. Phosphate groups, ribose sugar, adenine base.' This is the accurate structure that constitutes ATP, distinguishing it from other nucleotide molecules.
The activation of the sympathetic nervous system results in
A. An increase in digestion
B. A decrease in perspiration
C. A decrease in heart rate
D. An increase in respiratory rate
E. An increase in salvation
The right option is; D. An increase in respiratory rate
The activation of the sympathetic nervous system results in an increase in respiratory rate.
The sympathetic nervous system (SNS) is a part of the autonomic nervous system that induces the body's fight or flight response. The sympathetic nervous system functions through various networks of neurons and its activation results in pupil dilation, increased perspiration (sweating), decreased peristalsis (muscle contraction), increased heart rate, and increased blood pressure.
The activation of the sympathetic nervous system results in an increase in respiratory rate. So, the correct option is D.
What is the Sympathetic Nervous System?The sympathetic nervous system is a part of the autonomous nervous system and prepares the body for the fight or flight response during any potential danger.
The sympathetic nervous system functions to produce localized adjustments (sweating), and reflex adjustments of the cardiovascular system (heart rate). It also performs a crucial function in muscle contraction.
Therefore, the activation of the sympathetic nervous system results in an increase in respiratory rate.
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Melatonin is a molecule that is produced in the pineal gland and secreted into the blood. Melatonin then travels to different parts of the brain. It causes drowsiness and decreases body temperature to assist in the regulation of the sleep/wake cycle. What kind of control is used to regulate this molecule? A. muscular control, because the muscles can be used to control the release of melatonin B. neural control, because the brain sends the signal to release melatonin through nerve cells C. endocrine control, because melatonin is secreted into the blood and regulates body processes D. cardiovascular control, because melatonin flows through the blood to deliver the message
Answer:
C. endocrine control, because melatonin is secreted into the blood and regulates body processes
Explanation:
As mentioned in the question, melatonin is secreted by endocrine gland which is a part of human glandular or endocrine system. Endocrine system is responsible for secreting chemical messengers into the circulatory system of the humans, from where they travel to different target sites like brain.
Melatonin is also a chemical messenger which is secreted by pineal gland and travels through the blood stream to the targeted brain parts. When it reached the brain it directs it about the sleep wake cycle by causing lowered body temperature and increased drowsiness which together work in regulating sleep/wake cycle.
The endocrine system of the brain, is responsible for the regulation of melatonin secretion levels along with the hypothalamus region which get stimulated by light.
Therefore, C is the best option.
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Answer:
C. endocrine control, because melatonin is secreted into the blood and regulates body processes.
Explanation:
Melatonin is a hormone linked to the circadian cycle, ie, the way the body organizes its functions when we are awake and during sleep. The substance begins to be produced in the pineal gland as day goes on to help the body prepare for sleep. It reaches its maximum level when we are sleeping. As the sun rises and the light returns, the gland reduces the production of melatonin, which signals that it is time to wake up.
This hormone is secreted directly into the blood and regulates body processes, so we can say that melatonin is controlled by the endocrine system, which is the system responsible for producing hormones that are released into the blood and travel the body to control body processes.
The law of superposition states that layers of sedimentary rock are
A. ordered in a random fashion, with the age of the rock varying wildly from one layer to the next.
B. ordered in a time sequence, with the oldest layers on the bottom and the youngest on top.
C. ordered in a repeating pattern, with every third layer being identical.
D. ordered according to the age of the volcano that created the layer.
Answer:
B. ordered in a time sequence, with the oldest layers on the bottom and the youngest on top.
Explanation:
This is the right description of the way in which sedimentary rock is ordered. This is also compatible with the law of superposition. Sedimentary rock accumulates in the same order in which it is created. Therefore, the oldest layers are found at the bottom, while he newest ones are found at the top. This allows scientists to study the age of rock, and of any material that is found in these layers.
The law of superposition states that layers of sedimentary rock are ordered in a time sequence, with the oldest layers on the bottom and the youngest on top. Correct option is B.
The law of superposition is a fundamental principle in geology that states that in a sequence of undisturbed sedimentary rock layers, the oldest layer will be at the bottom, and the youngest layer will be at the top. This principle is based on the idea that in undisturbed rock layers, the deposition of new sediments occurs on top of older ones over time, creating a time sequence of rock layers with the oldest at the bottom and the youngest at the top. This principle is crucial in determining the relative ages of different rock layers and understanding the geologic history of an area.
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As demand for fossil fuels increases, all of the following events are likely except that __________. A. more fossil fuels will be created B. the price of fossil fuels will increase C. the cost of energy, such as electricity, will increase D. supplies will decline
Answer: A. more fossil fuels will be created
Fossil fuels are fuels which are formed over millions of years from dead remains of plants and animals buried under rocks. Heat from inside the earth and pressure from rock changes the dead remains into oil, natural gas and coal. Because these fuels cannot be replenish again they are called as nonrenewable fuels.
Answer: More Fossil Fuels Will Be Created
Explanation: Just Because That's the answer ;) Have A Blessed Day
Which statements describe the Mercalli scale? Check all that apply. This scale measures seismic waves based on their size. This scale rates an earthquake according to how much damage it causes. This scale produces a single rating for earthquakes that reach the surface. This scale uses Roman numerals to rank the damage caused by an earthquake. This scale measures the magnitude of an earthquake based on the size of seismic waves.
The Mercalli intensity scale refers to a seismic intensity scale used for determining the earthquake intensity. It determines the influences of an earthquake. It is different from the moment magnitude, which is generally reported for an earthquake that is a determination of the energy discharged.
The Mercalli scale determines the influences of an earthquake on the surface of the Earth, objects of nature, humans, and made-made compositions on a scale from I to XII. It refers to a scale that quantifies earthquakes on the basis of their intensity and how much destruction they make at a specific place.
Hence, the correct answers are options this scale rates an earthquake according to how much damage it causes, and this scale uses Roman numerals to rank the damage caused by an earthquake.
Answer:
is B
Explanation:
for the one that's single answer
Homeostasis refers to
A. the tendency of a cell to maintain a stable internal environment
B. the similarity of genetic traits to one another.
C. a mixture or solution that is the same throughout
D. the effect of natural selection on human evolution
Answer:
A. the tendency of a cell to maintain a stable internal environment
Homeostasis refers to the tendency of a cell to maintain a stable internal environment. The correct option is A.
What is homeostasis?Any self-regulating process, such as homeostasis, helps an organism retain stability while responding to environmental factors that are favorable for its survival. If homeostasis is effective, life goes on; if it is unsuccessful, the organism dies or suffers a catastrophe.
Homeostasis is a self-regulating process that enables an organism to retain internal stability while adapting to shifting external situations. It has emerged as the key unifying idea of physiology. The best illustration of homeostasis is the body's internal temperature.
Therefore, the correct option is A. the tendency of a cell to maintain a stable internal environment.
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