what is the energy needed to start a chemical reaction called
Answers
Activation energy
Explanation:Activation Energy is the minimum amount of energy needed to start a chemical reaction.
A chemical reaction consists of different atoms, molecules, or compounds that arrange themselves to create new compounds.The chemical reaction contains reactant molecules that produce product molecules.The minimum amount of energy that is required to start any chemical reaction is called activation energy.This is because some amount of energy is always needed to initiate the reaction whether it is exothermic or endothermic.The exothermic reaction also involves some activation energy to initiate the reaction, and later it releases this energy.Activation energy can be affected by the nature of the reactant and the effect of the catalyst.The unit of activation energy is KJ/mol.Related Questions
Is this an example of chemical or mechanical weathering? EXPLAIN based on your observations.
Answers
Answer:
Mechanical
Explanation:
I see no obvious signs of chemical weathering.
small cracks formed in the rock, water went into the rock and froze.
This kept repeating till the cracks got larger
Answer:
Mechanical weathering
Explanation:
chemical weathering is when the rocks chemical structure changes, some examples of this would be the statue of liberty. The statue of liberty is made out of copper, when copper is oxidized it changes colors. This is not what happened to the rock in the photo, what most likely happened is water seeped into the rock, it froze and then made the cracks bigger
HELP!!...............
Answers
Answer:
option D
Explanation:
Answer:
bacteria do not interact with organisms, so they do not maintain or disrupt their health.
Is d
Explanation:
bacteria that are resistant to sulfonamide have enzymes that have a greater affinity for what?
Answers
Bacteria that are resistant to sulfonamide have enzymes that have a greater affinity for para-aminobenzoic acid (PABA).
Sulfonamide antibiotics work by inhibiting the bacterial enzyme dihydropteroate synthase (DHPS), which is essential for the production of folic acid in bacteria. Without folic acid, bacteria are unable to synthesize DNA, RNA, and proteins, and they eventually die. However, some bacteria have developed resistance to sulfonamides by producing enzymes that have a greater affinity for PABA than DHPS.
PABA is a precursor to folic acid, and it is naturally present in many foods. When bacteria produce enzymes that preferentially bind to PABA, they can use this molecule to synthesize folic acid instead of relying on DHPS. This allows them to bypass the action of sulfonamides and continue growing and dividing.
The development of antibiotic resistance is a serious concern in modern medicine, as it can make it difficult or impossible to treat bacterial infections. To combat antibiotic resistance, it is important to use antibiotics judiciously and to develop new drugs and therapies that target different aspects of bacterial physiology.
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which vein drains the posterior aspect of the ventricles of the heart?
Answers
Answer: Azygos vein
Explanation: the azygos vein is located on the posterior aspect of the heart
PLZ HELP DUE IN 10 MIN
Answers
Answer:
Did you get it right?
Explanation:
A group of scientists is studying the internal parts of a cell. Which microscope is most appropriate for these scientists to use?
Answers
Answer: The most appropriate microscope for studying the internal parts of the cell is ELECTRON MICROSCOPE. The correct option is B.
Electron microscope, which is a compound microscope is usually used to study the internal environment of the cell because of the easiness with which one can easily distinguish the cell organelles from one another. Electron microscope gives great clarification of the cellular components and allow scientists to observe minute details about cellular structures. Electron microscope usually magnify specimens to one million times of their real sizes.
Answer:
\(\boxed{\mathrm{Electron \: microscope}}\)
Explanation:
Electron microscopes have high range of magnification and resolution, the tiniest structures of cells and organelles can be viewed through the microscope. Scientists use it for biomedical research.
a(n) _______ eye movement rapidly changes fixation from one object or location to another.
Answers
Saccadic eye movement rapidly changes fixation from one object or location to another.
They are an essential component of normal vision and allow us to scan and explore our environment efficiently. Saccades can be voluntary or reflexive, and they are controlled by a network of brain areas that include the superior colliculus, cerebellum, and frontal eye fields.
During a saccade, the eyes move at high speeds, up to several hundred degrees per second, and can make precise adjustments to accurately fixate on the desired object. However, saccades can also be influenced by factors such as fatigue, attention, and neurological disorders, which can affect their accuracy and timing.
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If you threw a ball up on the Moon, it would go up 6 times higher than on Earth. Explain how this is possible.
Answers
Answer:
Explanation:
A ball thrown up on the Moon would go up about six times higher than on Earth due to the significant difference in the gravitational force between the two celestial bodies.
The force of gravity pulls objects towards the centre of mass of a celestial body. The Moon has a much smaller mass compared to Earth, which results in a weaker gravitational pull on its surface. The gravitational acceleration on the Moon is approximately 1/6th of that on Earth.
When a ball is thrown up on the Moon, the force of gravity acting upon it is much weaker than on Earth. As a result, the ball experiences less resistance in moving against gravity and can reach a higher altitude before eventually falling back down.
On Earth, the stronger gravitational pull means that the ball faces more resistance in moving against gravity, and thus, it cannot reach as high of an altitude before gravity brings it back down.
So, while the action of throwing a ball up on the Moon is similar to that on Earth, the weaker gravity on the Moon allows the ball to overcome gravity's pull more easily, resulting in it reaching a significantly higher height, approximately six times higher than on Earth.
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Which process of angiosperm reproduction often requires insects or other animals to take place?
Answers
Answer:
Pollination
Explanation:
The movement of pollen through one plant to someone else is indicative of angiosperms. Via adaptation, angiosperms have formed specific relationships with a wide range of bugs and other species, transacting food and often offering shelter in exchange for pollination services.
Answer:
pollination
Explanation:
What is robotic process automation RPA and when is it beneficial?
Answers
Robotics process automation (RPA) is:
A software technology that makes it simple to create, use, and manage software robots that mimic human interaction with hardware and software.
RPA makes it possible for businesses to speed up operations while cutting costs, preparing them to handle upheaval and change.
What is robotics process automation?Business process automation technology that uses "virtual" software robots or "digital workers" based on artificial intelligence is known as robotic process automation. The term "software robotics" has been used occasionally.
What are the benefits of using RPA?The benefits are as follows:
Increase All-Around Productivity Gaining more efficiency will result in savings.Reliable Consistency in Hitting Accuracy Goals.Boost the security of corporate data.To achieve scale, seize the opportunity.Generating Data for Vital AnalyticsIncrease the quality of the customer experience.To know more RPA visit:
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Why are both prereading and postreading strategies used?
O to review meaning
O to increase reading speed
O to enhance comprehension
O to memorize text
Answers
Answer:
A. to review meaning
Explanation:
To review meaning are both prereading and postreading strategies used.
What is Prereading?
Before attentively reading a text (or a chapter of a text) from beginning to end, pre-reading is the process of scanning the material to identify essential concepts. sometimes known as surveying or previewing.
Pre-reading gives you an overview, which can help you read more quickly and effectively. Examining (and considering) chapter titles, summaries, headings, subheadings, study questions, and conclusions are typical pre-reading activities.
Students can use pre-reading tactics to anticipate what they will read or hear by considering what they already know about a particular topic. Teachers can focus on a book's organization, teach new vocabulary or other concepts, look for the primary idea, and provide students a reason for reading or listening before they even begin to read any material.
Therefore, To review meaning are both prereading and postreading strategies used.
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which of the following statements are true about sister chromatids? choose 1 answer: choose 1 answer: (choice a) a they each contain different alleles. (choice b) b they are tightly connected at the centromere. (choice c) c you get one from your mother and one from your father (choice d) d when attached, they are considered two chromosomes
Answers
The true statement about sister chromatid is: (b) they are tightly connected at the centromere.
Chromatid is the part of the chromosome that has a long thread-like appearance. there are two chromatids in one chromosome and they are denoted as sister chromatids. Each chromatid is the house for certain genes.
Centromere is the region of the chromosome where the two sister chromatids attach together. These are the constructed regions of the chromosome. Centromere is also the region for the attachment of spindle fibers during the process of cell division. Spindle fibers do not attach directly to the centromere instead attach via a protein called kinetochore.
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do nucleotide bonds dehydrate plants? i just need a yes or no answer
Answers
Answer:
no
Explanation:
idk
Describe possible Co-dominance in a unicorn
Answers
Answer:
The unicorn has spots.
Explanation:
This shows codominance becuase the to colors are both shown
What ecological levels does not describe interacting biotic and abiotic factors in an area
Answers
Answer:
The broadest, most inclusive level of organization is the biosphere. This includes both biotic and abiotic components of the earth and the part of the atmosphere that supports life.
The Habitat is an ecological level that does not describe interacting biotic and abiotic factors in an area.
What is Habitat?Habitat may be defined as a type of natural environment for which a particular species is best adapted due to natural selection. In other words, it may also be characterized as the area where the basic demands of an organism are fulfilled like food, space, and mating partner.
Habitat is something that only signifies the effect of abiotic factors which are favorable for the survival of any individual of any species under controlled variations.
In this question, the rest of the options include the biome, community, and ecosystem. All such ecological levels significantly illustrate the interaction between biotic and abiotic factors of a given area.
Therefore, the Habitat is an ecological level that does not describe interacting biotic and abiotic factors in an area.
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Your question seems incomplete. The most probable complete question is as follows:
Which of the following ecological levels does not describe interacting biotic and abiotic factors in an area?
BiomeCommunityEcosystemHabitatBecause of erosion over time, Location W on the topographic map will have the same elevation as Location X on the map.
How much will this erosion change the elevation at Location W, to the nearest meter?
Record your answer in the boxes below. Be sure to use the correct place value.
Answers
Answer:
9
Explanation:
The contour lines on this map are 20 units.
Location W is currently at 1349 units while X lies on the contour line for 1340.
To find change in elevation:
1349-1340=9 units
In which form do plants store energy?
starch
glycogen
chitin
cellulose
Answers
Answer:
starch
Explanation:
plant store energy in the form of starch and animal store energy in the form of glycogen these starch and glycogen are converted into glucose whenever body needs energy
Answer:
The answer is Starch
Explanation:
Hopefully this helps you
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It is right on Edge2020
what type of mutation causes cystic fibrosis? insertion scilent substitution deletion?
Answers
The out-of-frame deletion of 3 nucleotides from the CFTR gene, which causes the illness cystic fibrosis, is the most prevalent mutation (CTT).
A brief explanation of mutationA mutation is a change in our DNA sequence that can be brought on by environmental factors like UV radiation and cigarette smoke, or it can come from errors made during DNA replication.
What exactly are human mutations?A genetic mutation is an alteration to the DNA sequence of a gene that results in the production of a new organism. The DNA sequence of that gene undergoes a permanent modification. Human evolution, which is the process of change across generations, depends on genetic variety. One individual experiences a random genetic mutation.
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Explain at least three pro’s and three cons of invasive species solution. Three reasons why it’s a good solution and three reasons why it’s not, or what challenges it faces.
Who are the stakeholders (people who would care about this issue)? Include those who are supportive of the solution and how it would benefit the environment, and people who would be opposed to the solution (usually they would lose money somehow). If there are no people opposed, state that.
Answers
Answer:
The direct threats of invasive species include preying on native species, outcompeting native species for food or other resources, causing or carrying disease, and preventing native species from reproducing or killing a native species' young.
Explanation:
The bodies of plants, animals, and humans consist of about _________% water.
Answers
Answer:
90%
Explanation: Water is life. All living organisms are predominantly made of water: human beings about 60%, fish about 80%, plants between 80% and 90%. Water is necessary for all chemical reactions that occur in living cells—(it) is essential for food production and all living ecosystems.
The bodies of
Plants 80%
Animals 80%
Humans 60% water.
Fish 60%
Sickle-cell anemia is an interesting genetic disease. Normal homozygous individuals (SS) have normal blood cells that are easily infected with the malarial parasite. Thus, many of these individuals become very ill from the parasite and many die. Individuals homozygous for the sickle-cell trait (ss) have red blood cells that readily collapse when deoxygenated. Although malaria cannot grow in these red blood cells, individuals often die because of the genetic defect. However, individuals with the heterozygous condition (Ss) have some sickling of red blood cells, but generally not enough to cause mortality. In addition, malaria cannot survive well within these "partially defective" red blood cells. Thus, heterozygotes tend to survive better than either of the homozygous conditions. If 9% of an African population is born with a severe form of sickle-cell anemia (ss), what percentage of the population will be more resistant to malaria because they are heterozygous (Ss) for the sickle-cell gene?
SHOW YOUR WORK!
Answers
The guard cells in a plant's dermal tissue can change shape in order to open
and close tiny pores called stomata. This structure allows guard cells to
perform which function?
O A Allow the plant to flex and bend without injury
B. Prevent insects from attacking and eating the plant
O C. Expand in size to hold water, sugars, and lipids
OD. Control passage of gases and prevent excess water loss
Answers
D. Control passage of gases and prevent excess water loss.
Guard cells in a plant's dermal tissue are specialized cells that control the opening and closing of stomata, which are tiny pores on the surface of leaves that allow for gas exchange.
By changing their shape, guard cells can regulate the size of the stomatal pore and control the passage of gases such as carbon dioxide and oxygen, as well as regulate the loss of water vapor through the stomata. This is critical for regulating the plant's internal water balance and preventing excess water loss, especially in hot and dry environments.
Therefore, the correct answer is (D) Control passage of gases and prevent excess water loss.
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Which of the following statements about anaerobic respiration in plants is not true?
A
Occurs normally throughout the life
B
Incomplete breakdown of glucose takes place
C
End-products are ethyl alcohol and carbon dioxide
D
Proceeds in the absence of oxygen
Answers
Anaerobic respiration is a process that occurs in the absence of oxygen and involves the incomplete breakdown of glucose to produce energy. In plants, anaerobic respiration typically occurs in cells that are not receiving enough oxygen, such as those in roots or other parts of the plant that are submerged in water or soil. During anaerobic respiration, the end-products are typically lactic acid or ethanol, not ethyl alcohol and carbon dioxide.
A: Occurs normally throughout the life - This statement is true. Anaerobic respiration can occur at any time in a plant's life, although it is more common in certain situations, such as when the plant is experiencing stress or when oxygen is limited.
B: Incomplete breakdown of glucose takes place - This statement is true. During anaerobic respiration, the breakdown of glucose is incomplete, resulting in the production of smaller molecules such as lactic acid or ethanol rather than the complete breakdown of glucose to carbon dioxide and water.
D: Proceeds in the absence of oxygen - This statement is true. Anaerobic respiration is a type of respiration that occurs in the absence of oxygen. It is a process that plants and some other organisms use to produce energy when oxygen is not available.
Summarize how chemical energy is formed from light energy during photosynthesis.
Answers
A photochemically activated unique chlorophyll molecule of the photosynthetic reaction center loses an electron during an oxidation reaction, converting light energy into chemical energy.
What is photosynthetic reaction?Plants absorb carbon dioxide (CO2) and water (H2O) from the soil and atmosphere during photosynthesis. Water is oxidized, which means it loses electrons within the plant cell, whereas carbon dioxide is reduced, which means it receives electrons. As a result, the water is converted to oxygen and the carbon dioxide to glucose. Using water and carbon dioxide, photosynthesis converts solar energy into chemical energy in the form of glucose. As a byproduct, oxygen is released.In the presence of sunshine, photosynthesis is a series of chemical reactions that transform carbon dioxide and water into glucose (sugar) and oxygen. An endothermic reaction is photosynthesis. This implies that it requires energy to happen (from the Sun).To learn more about photosynthetic reaction, refer to:
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Based on the graph, how would Cook County, Georgia, be affected in the future if the trend continues and aquifers are eventually depleted
Answers
We can see here that Cook County, Georgia, will be affected in the future if the trend continues and aquifers are eventually depleted in the following way: C. Farmers would have less or no water for irrigation
What is trend?A trend refers to a general direction or pattern of change in a particular field, domain, or society over a period of time. It represents the prevailing tendency or inclination towards a certain style, behavior, concept, or phenomenon that gains popularity or widespread acceptance.
Trends can emerge in various areas, including fashion, technology, culture, business, social media, entertainment, and more.
The graph shows that the water level in the aquifer is decreasing over time. This means that there will be less water available for irrigation in the future.
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The complete question is:
Based on the graph, how would Cook County, Georgia, affected in the future if the trend continues and aquifers are eventually depleted?
USGS well 18H016, Cook County, Georgia
160
165
170
175
180-
185
1967
1974
1981
Year
1988
1995
2002
A. Land may rise because the weight of the water no longer compacts it.
B. It would become easier to cultivate crops.
C. Farmers would have less or no water for irrigation
D. Vegetation fed by groundwater would flourish.
Two pathways that yield NADPH in the cytosol, needed for fatty acid biosynthesis, are:
(1) _______(2)______
The correct repeated sequence of 4 types of chemical reactions involved in the fatty acid biosynthesis are: (1) _____ (2)______ (3)_______ (4)______
Answers
Two pathways that yield NADPH in the cytosol, needed for fatty acid biosynthesis, are: (1) Pentose phosphate pathway and (2) malic enzyme pathway.The correct repeated sequence of 4 types of chemical reactions involved in the fatty acid biosynthesis are: (1) Condensation (2) Reduction (3) Dehydration (4) Reduction
Two pathways that yield NADPH in the cytosol, needed for fatty acid biosynthesis, are:
1. Pentose phosphate pathway: In this pathway, the glucose molecule is oxidized to produce NADPH. The NADPH produced is used as a reducing agent in the fatty acid biosynthesis.
2. Malic enzyme pathway: In this pathway, malate is oxidized in the cytosol to produce pyruvate and NADPH.The correct repeated sequence of 4 types of chemical reactions involved in the fatty acid biosynthesis are:
1. Condensation: In this step, two molecules of acetyl-CoA are combined by a thioester bond to form acetoacetyl-CoA.
2. Reduction: In this step, NADPH is used as a reducing agent to reduce acetoacetyl-CoA to beta-hydroxybutyryl-CoA.
3. Dehydration: In this step, the water molecule is removed from beta-hydroxybutyryl-CoA to form crotonyl-CoA.
4. Reduction: In this step, NADPH is used as a reducing agent to reduce crotonyl-CoA to butyryl-CoA.
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What would you expect to happen to the number of high tides in any given area if the rate of Earth's rotation doubles?
Answers
Answer:
high tides would also double within the span of 24 hours.
Explanation:
If the Earth's rotation doubled then the number of high tides would also double within the span of 24 hours. This is because low and high tides depend on the Earth's pull toward's the Moon, since as the ocean bulges toward the moon, a high tide is created. Therefore if Earth's rotation doubled, this would mean that pull towards the Moon would happen twice in 24 hours, and thus causing high tide twice.
PLZ HELP ASAP. I DONT UNDERSTAND THIS
Answers
Answer:
b
Explanation:
b
Mendel utilized the garden pea, Pisum sativum, for his studies based on features that include all but ________. Group of answer choices can generate a large number of progeny has a wide, continuous spectrum of phenotypes
Answers
Mendel utilized the garden pea, Pisum sativum, for his studies based on several features. One of the features is that it can generate a large number of progeny, which allows for statistical analysis.
Another feature is that it has a wide, discontinuous spectrum of phenotypes, which allows for easy observation and categorization of traits. Therefore, the missing term in the statement is "discontinuous" instead of "continuous." In Mendel's experiments, he focused on discrete traits, such as flower color, seed shape, and pod shape, which are easily distinguishable and do not show intermediate phenotypes. This made it easier for Mendel to establish his laws of inheritance, which are still relevant in genetics today.
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Review Part A Observed ratio: 350:50 Null hypothesis (a) The data fit a 3:1 ratio. Null hypothesis (b) The data fit a 1:1 ratio. In assessing data that fell into two phenotypic classes, a geneticist observed values of 350:50.
Answers
Based on the observed ratio of 350:50, the geneticist needs to review two null hypotheses. The first null hypothesis, (a), suggests that the data should fit a 3:1 ratio, while the second null hypothesis, (b), suggests that the data should fit a 1:1 ratio.
To determine which null hypothesis fits the observed data, the geneticist would perform a chi-squared goodness-of-fit test. This test compares the observed data with the expected data under each null hypothesis. If the chi-squared value is significant (i.e., the p-value is less than 0.05), then the null hypothesis can be rejected, and the alternative hypothesis is accepted.
For null hypothesis (a), the expected data would be 262.5:87.5, which is a 3:1 ratio. For null hypothesis (b), the expected data would be 200:200, which is a 1:1 ratio.
Once the expected values are calculated, the geneticist can calculate the chi-squared value and the associated p-value. If the p-value is less than 0.05, then the null hypothesis can be rejected, and the alternative hypothesis is accepted.
In this case, based on the observed ratio of 350:50, the geneticist may expect the data to fit either a 3:1 or a 1:1 ratio, depending on the null hypothesis being tested. Therefore, the geneticist needs to perform a chi-squared goodness-of-fit test to determine which null hypothesis best fits the observed data.
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