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What must happen before a chemical reaction can begin?
The activation energy must be exceeded.
The activation energy must be reached.
The concentrations of products and reactants must be equal.
The concentration of reactant molecules must be reduced.

Answers

Answer 1

Answer:

A

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I apologize if my answer is incorrect I will better my answering strategies if it is incorrect.

Explanation:

Answer 2
A - the activation energy is the minimum energy needed for the reaction to take place

Related Questions

Can someone plz help me? :(

Answers

Answer:

D - design a device that can throw an object at least 15 metres

Answer:

D. Design a device that can throw an object at least 15 meters.

Explanation:

First of all, the object shown as you may be able to tell, look like a catapult. It also shows the top end of it holding a ball, getting ready to launch it. It then shows a line of the ball traveling after being launched. The balls land of the ground at 15 meters. From this iformation you look at the options:

A. Design an object that is 10 meters tall.

No, because 10 meter is just the highest point of the ball being launched.

B. Design a vehicle that can travel across a 10-meter feild.

No, because it is the ball that is traveling, not the catapult.

C is about a vehicle traveling again, so eliminate that too.

D. Design a device that can throw an object at least 15 meters.

This describes exactly what we soo in the picture. Meaning D is correct.

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The following tracking model was created for Hurricane Ike on September 8, 2008. ^^
According to this model, at which point is the storm least likely to make landfall?
1) Point A
2) Point B
3) Point C
4) Point D​

Answers

Answer:

Its Point A

Explanation:

The following tracking model was created for Hurricane Ike on September 8, 2008. Map of Gulf Coast showing the forecasted path of Hurricane Ike on September 8, 2008. The storm’s current location, as of 5 p.m. on Friday, is just south of Cuba, over the Caribbean Sea. The “cone of probability” extends northwest. Point A is located along the Texas coast, right in the center of the cone’s widest point. Point B is located along the coast of Louisiana, toward the easternmost edge of the cone. Point C is located further east, along the coast of the Florida Panhandle. Point D is located on the border between Mexico and Texas, toward the southwestern-most edge of the cone. According to this model, at which point is the storm least likely to make landfall?

what biotic factors are in freash water moderat rivers?? (list atleast 4) please

Answers

Answer:

algae,fish and bacteria and  aquatic invertebrates

Explanation:

Because how would the economy work without half of these things

What is the disadvantage of plasmolysis to the terrestrial plants?​

Answers

Answer:

technical of plants living on the land or on the ground,so floppy plant.

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Why are hydrogen bonding and popularity so important for water molecules?

Answers

Answer:

they are so important because the presence of hydrogen bonds also makes water molecules more 'sticky' or in scientific terms cohesive and adhesive. The small charges on the water molecules allows them to stick together which is why water has a 'skin' that small insects can walk on, and also explains why water can be sucked up a straw so easily.

Explanation:

I hope this helps you!

Selects all of the BENEFITS of a PARALLEL circuit. (Lesson 5.09)

A If one bulb burns out the rest of the bulbs will stay lit.

B The bulbs do not get dimmer when we add more bulbs to the circuit.

C The circuits are more complex and expensive.

D The circuits use less wire.

Answers

Answer:

c and b

Explanation:

What were the physical conditions of the Earth? Where is the evidence to support this claim?

Answers

Answer:

Water earth fire and rain hurricanes fire tornados etc

Explanation:

There are millions of physical conditions but that's the only ones I could think of.

Neurotransmitters that do not bind with the postsynaptic neuron are sometimes taken back up into the presynaptic neuron in a process called

Answers

Answer:

Reuptake

Explanation:

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which french cheese was called the king of the cheeses?

Answers

Roquefort is the king of cheese.

Cell processes that increase the surface area of a cell are called:

Answers

Answer:

Answer below

Explanation:

As the radius of a cell increases, its surface area increases as the square of its radius, but its volume increases as the cube of its radius (much more rapidly).Therefore, as a cell increases in size, its surface area-to-volume ratio decreases.Prokaryotic cells have internal folding of the cell membrane which are responsible for certain functions like respiration.These foldings too increase the surface area.

Prokaryotic cells have internal folding of the cell membrane which are responsible for certain functions like respiration. These foldings increase the surface area.

Eukaryotic cells are compartmentalized which is a method to increase the surface area as there are lots of membranes inside the cell across which many processes take place.

In some cells like the ones making the lining of the villi in the small intestine there are folding in the outer cell membrane which also increases the surface area,

Non-motile cilia are structures in a cell membrane that also increase surface area. Non-motile cilia are like oars that push through the cell membrane. They are thinner and longer than microvilli. Non-motile cilia are also called primary cilia.

__________________________________________________________

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In terms of structure and function how do the vacuoles in a typical plant cell compare to those of a typical animal cell

Answers

Answer:

Vacuoles in animal cells do NOT help the cell take its shape, however, in plant cells, vacuoles are larger, and DO affect the shape of the cell.

The function of the vacuole in plants is different from that in animals, as the vacuole in animals is smaller, while in plants it is larger and pushes the nucleus to one side while consisting of water and other materials.

What is the significance of the vacuole in plants and animals?

Vacuoles are cell organelles found in both plants and animals, in plants, vacuoles are large, fluid-filled structures that occupy a large portion of the cell, and they perform several important functions, including storing water and helping to maintain the shape of the cell, while in animals, vacuoles are smaller and less in number than in plants, as they have a variety of functions, like storing waste materials, etc.

Hence, the function of the vacuole in plants is different from that in animals, as the vacuole in animals is smaller, while in plants it is larger and pushes the nucleus to one side while consisting of water and other materials

Learn more about the significance of the vacuole here.

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Which two types of RNA are joined together by base pairing a codon with an anticodon ?

A- tRNA and rRNA

B- mRNA and rRNA

C- tRNA and itself

D- mRNA and tRNA

Answers

Answer:tRNA (translate rna) and mRNA(messenger rna).

Explanation:

1. Explain the function of white blood cells in the body.


2.
How is a red blood cell adapted to carry
oxygen and nutrients throughout the body? Explain


3.
What would happen to us if no platelets
are found within the blood again. Explain.

4. Give the general (collective) functions of the blood

Answers

Answer:1. White blood cells are part of the body's immune system. They help the body fight infection and other diseases.

2. Red blood cells have adaptations that make them suitable for this.

3. The blood would not clot in case of an injury.

4. Blood supplies essential substances and nutrients.

Explanation: 1. White blood cells are able to recognize viruses and/or infectious germs, which is how they fight off disease/sickness. It is also why we have vaccines. Vaccines put either dead or weakened parts of a germ into your body. Then, the white blood cells recognize it and fight it off the next time it enters your body.

2. They contain hemoglobin, a red protein that combines with oxygen. They have no nucleus so they can contain more of the hemoglobin. they are small and flexible so that they can fit through narrow blood vessels.

3. This will lead to excess blood loss and can even lead to the death.

4. Such as as sugar, oxygen, and hormones to our cells. It also carries waste away from the cells, this waste is eventually flushed out of the body in urine, feces, sweat, and lungs.

In this pedigree, 1-2 is
because they are shaded in.

Answers

Answer:

is affected ( has the trait)

Explanation:

Describe the composition of the cell membrane

Answers

Explanation:

With few exceptions, cellular membranes — including plasma membranes and internal membranes — are made of glycerophospholipids, molecules composed of glycerol, a phosphate group, and two fatty acid chains. Glycerol is a three-carbon molecule that functions as the backbone of these membrane lipids.

Human cells have 46 chromosomes. Each chromosome consists of a pair of identical chromatids attached together by a structure called a centromere. Once the chromosome has split, each chromatid is called a daughter chromosome. At the end of cytokinesis, how many daughter chromosomes will be found in each cell? Explain.

Answers

Answer:

92 daughter chromosomes.

Explanation:

There are 46 chromosomes in a normal cell and each chromosome turns into 2 daughter cells. So 46 plus 46 is 92.


Just for the fun of it, someone walking along the shore in Beaufort, South
Carolina, throws a bottle with a message in it into the sea. Some time later,
someone in Perth, on the west coast of Australia, finds the bottle.
Referring to map, trace the path the bottle probably took! Make sure to
reference specific currents on your path.

Answers

The currents that carry the bottle from South Carolina to Peth are the West Wind Drift and the South Equatorial Current.

According to the information provided by the map, it can be inferred that the bottle that is thrown into the sea in South Carolina, USA and arrived in Perth, Australia took the following route:

It traveled down the Atlantic Ocean from the United States to the West Wind Drift current. Once there, it is transported from the west to the east, passing through the lower part of Africa and Asia until it reaches the Indian Ocean. When it reaches the Indian Ocean it is carried by the South Equatorial Current with a northeast direction. In this direction it reaches the coast of Peth, Australia.

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Homeostasis is necessary for a cell to survive. What is the definition of homeostasis

Answers

Answer:

Homeostasis is the process of maintaining a constant internal environment suitable sustaining life.

Homeostasis continues to maintain ideal environment for enzyme action and all cell functions throughout the body.

Why homeostasis is necessary?

It is the preservation of a constant internal environment in the face of changing internal and external conditions. These include blood glucose concentration control in the human body.

A series of control mechanisms at the organ, tissue, or cellular level maintain homeostasis.

Substrate supply, activation or inhibition of individual enzymes and receptors, enzyme synthesis and degradation, and compartmentalization are examples of control mechanisms.

The liver, pancreas, kidneys, and brain (hypothalamus, autonomic nervous system, and endocrine system) all contribute to homeostasis.

The liver is in charge of metabolizing toxic substances and maintaining carbohydrate metabolism with pancreatic signaling.

Thus, homeostasis is necessary for a cell to survive.

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What is the difference between community and ecosystem?
Please help

Answers

Answer:

Ecosystems are composed of all of the various living organisms, along with the abiotic factors that impact them. The difference between community and ecosystem in ecology is that the community only refers to living things within an ecosystem. A sample of soil can provide a small-scale example.:

please answer this. what is it

Answers

Answer:

B: mountain lions porbably outcompete wolves for food.

what type of cells assist with the take up of microbes in the intestine and release them on the other side for macrophages?

Answers

Answer:

specialized cells that take up microbes from the intestine and release them on the other side for macrophages defensins

(if im wrong sorry i have to answer a question so I don't have to have ads)

Answer:

a

Explanation:

a

For people who need to study this

Answers

Answer

ok

Explanation:

Answer: okay thank you sir!

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List three limitations for measuring cell size​

Answers

Answer:

Cell size is limited by the cell's surface- area- to - volume ratio

A blood sample consists of dead cells that are breaking apart into their basic molecular building blocks. What type of molecule is best suited for identifying the specimen

Answers

Answer:

D N A!!!!

Explanation:

have a great day on your assignment


Which of the following best describes the components of the DNA twisted ladder?

A. The sides are made of alternating polypeptide chains, and the rungs are made of amino acid segments joined by
hydrogen bonds

B. The sides are made of alternating amino acids, and the rungs are made of polypeptide chains joined by hydrogen bonds.

C. The sides are made of alternating phosphate-sugar groups, and the rungs are made of complementary nitrogenous
bases joined by hydrogen bonds

D.The sides are made of alternating nitrogenous bases, and the rungs are made of phosphate-sugar groups joined by hydrogen bonds

Answers

The sides are made of alternating phosphate-sugar groups, and the rungs

are made of complementary nitrogenous bases joined by hydrogen bonds

DNA which is also called Deoxyribonucleic acid contains genetic information

which are passed from the parent to offspring. DNA is made up of an

alternating phosphate-sugar group in which the sugar is deoxyribose.

The alternating phosphate-sugar group are located at the side of the ladder.

The rungs are made up of complementary nitrogenous bases joined by

hydrogen bonds. Example of nitrogenous bases include adenine, thymine,

guanine and cytosine.

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what land forms are created by wave and deposition?

Answers

Answer: It can create unique landforms, such as wave-cut cliffs, sea arches, and sea stacks. Deposits by waves include beaches. They may shift along the shoreline due to longshore drift. Other wave deposits are spits, sand bars, and barrier islands.

Explanation:

Proteins are polymers of amino acids linked by ______. Multiple choice question. hydrogen bonds phosphodiester bonds covalent bonds peptide bonds

Answers

Answer:

peptide bonds

Explanation:

Amino acids are linked together into linear chains called polypeptides

Lake Victoria, shown in the population map above, is the largest lake in Africa

and is home to fish called cichlids (pronounced SIK-lids). In the 1950s, a new

fish, the Nile Perch, was introduced into Lake Victoria. This map shows the

change in the cichlid population since the Nile Perch was introduced.


Use the map above to answer the questions below.


1. Using a Key In which year was the number of cichlids the greatest?


2. Using a Key How many years did it take for the cichlid population to decrease

by 50 percent?


3. Inferring Relationships Which fish in Lake Victoria do you think is higher on

the food chain

the cichlid or the Nile Perch? Explain your answer.


4. Identifying Trends Based on the rate of decrease of cichlids shown on the map,

what do you think will happen to the cichlid population by 2050? Explain your

answer.

Answers

Don’t worry I’ll answer your questions ASAP

To read signs, you need to have good ________ . focal vision peripheral vision paracentral vision double vision

Answers

Pretty sure it’s focal vision.
Hope that helps:)

To read signs, one needs good peripheral vision. The capacity to see things that are beyond of one's direct line of sight is known as peripheral vision. It is the capacity to perceive things that are beyond of one's direct field of vision.

Because it enables a person to perceive items that are situated at the boundaries of their peripheral vision, this form of vision is crucial for reading signs.

For instance, it's crucial to be able to understand signs that are placed along the side of the road when driving. A person might not be able to see the signs and might miss crucial information without adequate peripheral vision. Aside from peripheral vision, clear focus vision is crucial for reading.

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Multiple choice. Please help !!!!

Answers

Answer: B. if im correct.

Explanation:

answer is b

it says my answer has to be 20 letters long

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