if the activation energy needed for a chemical reaction is decreased by the presence of a

Answers

Answer 1

Answer:

Presence or Absence of a Catalyst

Catalysts are substances that increase reaction rate by lowering the activation energy needed for the reaction to occur. A catalyst is not destroyed or changed during a reaction, so it can be used again.

Explanation:

Answer 2

The activation energy that is been required in a reaction will decreased when there is presence of Catalyst.

Catalysis can be regarded as a  process involving the increase in the rate of a chemical reaction through addition of catalyst.

This catalyst usually speed the reaction up by lowering the activation energy of the system.

We can conclude that example of a catalyst is Nikel, used in hydrogenation.

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Related Questions

A single fertilized egg divides into many separate embryos is known as Metamorphosis Polygyny Polyembryony Viviparous

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Multiple embryos are created as a result of fertilization of the egg. Polyembryony is the name given to this phenomena.

when one fertilized egg splits into numerous distinct embryos?

Monozygotic twins, often known as identical twins, are created when a fertilized egg divides into two distinct embryos.Monozygotic twinning can happen spontaneously or as a result of IVF procedures.Monozygotic twinning in nature is thought to be spontaneous and typically happens after the blastocyst ruptures.

What factors into the host's hemostatic reactions during blood feeding?

The bloodsucking insect Rhodnius prolixus had evolved a sophisticated salivary secretion with dozens of distinct proteins in order to get around host defenses that limit blood loss.

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HELP PLEASE !!

In some areas of the world, less water means some people must drink and
bathe in contaminated water. What can be the result of this?

not getting clean

no effect

illness and disease

thirst is not quenched

Answers

Illness and disease is the answer

Animals that are born in water, then transform and live on land as adults, are cold-blooded, and have thin breathable ski are grouped in the class

Answers

Answer:

i belive it's amphibians? I think

Which is needed to obtain DNA from a crime scene or an individual?


Which is needed to obtain DNA from a crime scene or an individual?


clothing fibers


fingerprints


pedigree analysis


cells

Answers

To obtain DNA from a crime scene or an individual, the key requirement is cells.

Clothing fibers, fingerprints, and pedigree analysis are not directly related to the collection or extraction of DNA. DNA, the genetic material, is contained within cells of an individual's body.

Therefore, to obtain DNA, one needs a sample that contains viable cells. This can include various biological materials like blood, saliva, hair follicles with the root, skin cells, or semen.

These samples are collected using appropriate forensic techniques and then subjected to DNA extraction processes to isolate and analyze the genetic material.

Through DNA analysis, forensic investigators can establish links between individuals, identify suspects, or provide evidence in criminal investigations.

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osmolarity-detecting cells located in the nuclei of the (click to select) are stimulated by an increasing blood solute concentration.

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An increasing blood solute content stimulates osmolarity-detecting cells in the hypothalamic nuclei, notably the supraoptic and paraventricular nuclei.

The control of antidiuretic hormone (ADH), also known as vasopressin, is the responsibility of these cells.Osmoreceptor cells in the hypothalamus notice changes when blood osmolarity rises, a sign of higher solute concentration. The posterior pituitary gland releases ADH as a result of the stimulation of the osmoreceptor cells, which then send signals to the supraoptic and paraventricular nuclei.Purification of urine and a reduction in water loss from the body are both aided by ADH's action on the kidneys to encourage water reabsorption. The release of ADH by the osmoreceptor cells in response to an increase in blood solute concentration contributes to maintaining correct osmolarity and fluid balance.

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what are body building food

Answers

Answer:

Proteins

Explanation:

Red meat, peanut butter, protein shakes etc

Answer:

just go on a dirty or clean bluk

Explanation:

Earth revolves in what direction

Answers

Answer:

Its rotation direction is prograde, or west to east, which appears counterclockwise when viewed from above the North Pole, and it is common to all the planets in our solar system except Venus and Uranus, according to NASA

Answer:

When viewed above the North Pole, the Earth rotates counterclockwise, from west to east.

which of the following is not a major function of the kidneys?group of answer choicesregulation of acid-base balanceremoval of metabolic wastesregulation of blood volume and blood pressurehematopoiesis

Answers

The following is not a major function of the kidneys : "hematopoiesis". The kidneys are responsible for several vital functions in the body, including the regulation of acid-base balance, removal of metabolic wastes, and regulation of blood volume and blood pressure.

However, hematopoiesis, which is the process of blood cell formation, primarily occurs in the bone marrow. Therefore, it is not considered a major function of the kidneys.

The kidneys primarily focuses on the regulation of acid-base balance, removing metabolic wastes and also  regulating blood volume and blood pressure. Hematopoiesis, which is the production of blood cells, primarily occurs in the bone marrow.

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PLEASE HELP! I GOING TO FAIL!

Nutrients are brought to spongy bone through which mechanism? (2 points)

Transport through Haversian canals
Diffusion through canaliculi
Diffusion through the lacuna
Transport through collagen fibers

I'm completely sure it's not the first option, but I don't know which one it is!!!!

Answers

Answer:

DIFFUSION THROUGH CANALICULI.

Explanation:

Through the process of diffusion through the canaliculi, nutrients are delivered to compact bone. Osteocyte communication occurs through microscopic channels called canaliculi that exist between lacunae.

You got this! Don't think that you're going to fail! Stay in there!

The answer would be Diffusion through canaliculi and arteries that pass through the compact bone foraminifera

Anyone wanna help me out with these questions word box at the top.

Anyone wanna help me out with these questions word box at the top.

Answers

Answer:

1) phenotype

3) punnette square

4) pedigree

5) sickle cell anemia

6) hemophilia

7) cystic fibrosis

8) albinism

9) muscular dystrophy

10) chromosomes

11) heterozygous

12) co-dominant

13) sex linked

14) heredity

15) dominant

16) recessive

17) Gregor Mendel

18) genetics

Explanation:

Hope this helps :)

How long is a gestation period for a mouse

Answers

Answer:

an average of 3 weeks (19-21 days)

Explanation:

Equation for Aerobic Respiration​

Answers

C6H12O6 + 6O2 yields 6CO2 + 6H2O + energy (as ATP).
C6H12O6+6O2yields 6C02+6H2O+enegery(as ATP)

Choose the types of alternative splicing patterns with the correct description of how they lead to the production of different protein isoforms. Select the three correct statements.

a)Alternative splice sites within an exon−different versions of an exon exist that allow for the presence of different domains in the protein.

b)Mutually exclusive exons−certain sequences are either included or excluded, which allows generation of proteins with different sequences.

c)Cassette exons−whole exons are excluded from the mature message, resulting in a protein that is missing certain sequences (perhaps an entire protein domain).

d)Alternative promoters−produce messages with different 5′ exons and proteins with different N-terminal ends.

e)Intron retention−introns are included in the mature mRNAs, which can be used only to produce novel isoforms of the protein.

f)Alternative polyadenylation−produces messages with different 3′ coding sequences as well as different 3′ untranslated regions, which can be important in regulatory events.

Answers

Alternative splicing patterns refer to the various ways in which exons and introns are combined to create different protein isoforms from a single gene. There are several types of alternative splicing patterns, but only three are correct in relation to how they lead to the production of different protein isoforms. These include:

a) Alternative splice sites within an exon: This type of alternative splicing pattern involves different versions of an exon that exist, allowing for the presence of different domains in the protein.

b) Mutually exclusive exons: In this pattern, certain sequences are either included or excluded, which allows the generation of proteins with different sequences.

c) Cassette exons: This pattern involves whole exons that are excluded from the mature message, resulting in a protein that is missing certain sequences (perhaps an entire protein domain).

By utilizing these alternative splicing patterns, genes can produce a wide range of protein isoforms with varying functions.
Your answer: The three correct statements about alternative splicing patterns that lead to the production of different protein isoforms are:

b) Mutually exclusive exons - Certain sequences are either included or excluded, which allows the generation of proteins with different sequences.

c) Cassette exons - Whole exons are excluded from the mature message, resulting in a protein that is missing certain sequences (perhaps an entire protein domain).

d) Alternative promoters - Produce messages with different 5′ exons and proteins with different N-terminal ends.

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What are the 6 categories of water pollution?
pick all that are correct
point source
transboundary
mountain spring water
non-reverse osmosis.water
reverse osmosis water
nonpoint source
ground water
surface water
ocean water
arctic water

What are the 6 categories of water pollution?pick all that are correctpoint sourcetransboundarymountain

Answers

Answer: Chemical pollution. ...Groundwater pollution. ...Microbiological pollution. ...Nutrient pollution. ...Oxygen-depletion pollution. ...Surface water pollution.

Explanation: hope it helps you .

describe the water cycle here on Earth and explain how it demonstrates the law of conservation of matter.

Answers

Answer:

Start with evaporation. Place a full cup of water in front of a sunny window. Use a marker to make a line at the beginning water level.

After evaporation we have condensation. When the water vapor reaches the sky it cools to form clouds.

Finally, a precipitation experiment. Again, fill a cup almost full with water.

Explanation:

Matter is conserved because atoms are conserved in physical and chemical processes. As complex as the water cycle is, water molecules are conserved and endlessly recycled in nature. Conservation of mass is a physical law that s never broken.

you're welcome!!

Identify a disease or disorder and explain how it might be controlled by genetic engineering.

Answers

Answer:

Almost all the insulin produced for diabetics is made through a process involving genetic engineering. Treatments for infertility, hemophilia, blood clotting, and dwarfism also depend heavily on genetic engineering, as does immunotherapy for developing cancer treatments. Did this answer your question?

Explanation:

a) What are Mesosomes? Write its function b) What are plasmids?

Answers

Answer:

a) The mesosome was thought to increase the surface area of the cell, aiding the cell in cellular respiration. ... Mesosomes were also hypothesized to aid in photosynthesis, cell division, DNA replication, and cell compartmentalisation. b) A plasmid is a small, circular, double-stranded DNA molecule that is distinct from a cell's chromosomal DNA.

i hope this helped :)

Explanation:

an organelle in the cytoplasm of a eukaryotic cells containing decorative enzymes enclosed in a membrane

methylation regulates transcription a. via the addition of a methyl group to cytosine bases of dna. b. via the addition of a methyl group to cytosine residues on rna polymerase ii. c. via the addition of a methyl group to cysteine residues on rna polymerase ii. d. via the addition of a methyl group to cysteine bases of dna.

Answers

Option A, methylation regulates transcription via the addition of a methyl group to cytosine bases of DNA.

DNA methylation controls gene expression by attracting proteins implicated in gene repression or by preventing transcription factor(s) from binding to DNA. De novo DNA methylation and demethylation both play active roles in the dynamic process that alters the pattern of DNA methylation in the genome during development. DNA methylation, in general, inhibits transcription, and loss of methylation is linked to gene activation. In rare circumstances, DNA methylation might directly obstruct the binding of transcription factors.

The complete question is:

Methylation regulates transcription

a. via the addition of a methyl group to cytosine bases of DNA

b. via the addition of a methyl group to cysteine residues on RNA polymerase II

c. via the addition of a methyl group to cysteine basses of DNA

d. via the addition of a methyl group to cytosine resides on RNA polymerase II

e. by interfering with the chromatin remodeling process

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Mitigation banking is supposed to accomplish what?nothingtrading wetlands for forest landsallowing development of wetland for a feerequiring the restoration of all wetlandsallowing destruction of wetlands if an equal wetland is created elsewhere

Answers

Using mitigation banking, one can make up for the ecological harm caused by development projects by preserving and restoring another region.

What does a banking mitigate mean?

Mitigation financial services is a practise in which an official organisation or private business ("banker") conducts an environmental restoration and preservation project to provide offset for inevitable wetland damage within a specified region (mitigation banking area).

What is the purpose of mitigation?

Mitigation is the process of attempting to mitigate the effects of disasters in order to lessen the organism loss both life and property. Simply put, mitigation can prevent the disastrous effects of natural disasters like storms and flooding.

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.write the difference between

a.Soil formation and Soil erosion

b.Soil pollution and Soil profile

Answers

A. In soil erosion, the soil is carried away from by the wind or water from the top layer of the ground. Soil formation is making soil. It can be by the deposition of the soil from water or wind.

5. Registre una situación (por cada integrante que participa) de la vida diaria en la que se aplican los procesos cognoscitivos básicos. Ejemplo: Cuando realizó la descripción de mi mascota: es gris, de altura mediana, de ojos redondos, etc. Es porque la he percibido y la puedo describir.

Answers

La respuesta correcta para esta pregunta abierta es la siguiente.

No sabemos cuántos integrantes participan en tu actividad. No lo mencionas.

Lo que podemos hacer es ponerte otro ejemplo para que tú desarrolles los que necesites.

La situación sería la siguiente.

Cada vez que entro al restaurante de mi tía Lola, todos mis sentidos se despiertan por la cantidad de comida que hay en la cocina, los colores de las frutas, los tonos de las verduras, los olores de los condimentos, y las texturas de la carne, el pescado y el pollo. Ese ambiente me transporta a un festín de sabores.

Este ejemplo es valido porque puedo ver los colores diversos y fulgurantes, puedo oler los aromas de los diferentes condimentos, puedo escuchar el sonido de las cocineras cortando y guisando, además de que puedo sentir las texturas de los alimentos crudos al tocarlos.

Why is the LD50 different for each chemical substance?
Why is it important to know the LD50 of a substance? Give one real life example.

Answers

The LD50 is different for each chemical substance because it depends on factors such as the chemical's toxicity, route of exposure, species and age of the test animals and  duration of exposure.

Why is it important to know the LD50 of a substance?

The LD50, or the median lethal dose, is the amount of chemical substance that is required to cause the death of 50% of population of test animals, usually within specified time period. The LD50 is different for each chemical substance because it depends on a variety of factors such as the chemical's toxicity, the route of exposure (such as ingestion, inhalation, or skin contact), the species and age of the test animals, and the duration of exposure.

It is important to know the LD50 of a substance because it helps in assessing the potential risks associated with exposure to that substance.

One real-life example of the importance of knowing the LD50 of a substance is in the field of pesticide regulation.

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2. A population of 1275 jack-rabbits lives on 450 hectares of western Kansas grassland. Studies indicate the following rates for this population:
Mortality 2225/year
Natality 3400/year
Emigration 775/year
Immigration 150/year
a. What is the "r" (intrinsic growth rate) for this population?
b. Assuming the same r, what will be the population size at the end of 4 years?

Answers

The population size at the end of 4 years will be approximately 5,322 jack-rabbits. a. To find the intrinsic growth rate (r) for this population, we need to consider the natality, mortality, immigration, and emigration rates. The formula for calculating r is:

r = (natality + immigration) - (mortality + emigration) / current population

Using the given rates:
r = (3400 + 150) - (2225 + 775) / 1275
r = (3550) - (3000) / 1275


r = 550 / 1275
r ≈ 0.4314

The intrinsic growth rate (r) for this population is approximately 0.4314.

b. To calculate the population size at the end of 4 years, we can use the exponential growth formula:

future population = current population * (1 + r)^t

Where t is the number of years. In this case, t = 4:

future population = 1275 * (1 + 0.4314)^4
future population ≈ 1275 * (1.4314)^4


future population ≈ 1275 * 4.171
future population ≈ 5321.57

Assuming the same intrinsic growth rate (r), the population size at the end of 4 years will be approximately 5,322 jack-rabbits.

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Brendan made a chart to categorize the characteristics of animals. An empty 2-column table titled Characteristics of Animals. Column 1 is labeled Always. Column 2 is labeled Sometimes. Which phrase should be written in the column titled "Sometimes"? Are multicellular Have membrane-bound organelles Produce their own food Display an asymmetrical body plan.

Answers

The phrase written in the  columns are:

Column 1 : Always Have membrane-bound organelles.  

Coumn2 : Sometimes produce their own food.

Column 2: Display an asymmetrical body plan.

What are multicellular organisms?

Multicellular organisms are made up of more than one cell.

There is a cell differentiation in these organisms in early stage.

In humans, skin cells, muscle cells, blood cells, and many more different cells are present.

Examples are all animals, plants, and fungi are multicellular organisms.

Thus, the phrase is produce their own food and display an asymmetrical body plan.

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Answer:

A

Explanation:

One of the uses for a protein is

Answers

To repair body tissues
It also works as an enzyme

Lloyds lab partner is looking down into a test tube while he hears the contents by using a flame. Which action should Lloyd recommend to his partner if heating must continue?

Answers

Answer:

To stop looking throught the test tube. lol

Explanation:

the cis to trans conversion of retinal when photopigments respond to light is called:

Answers

The cis to trans conversion of retinal when photopigments respond to light is called isomerization.

What is isomerization?Isomerization is a chemical process that converts one isomer into another without altering the overall atomic composition. Isomerization may be a physical process such as changing the position of a molecule within a crystal lattice or a chemical process in which the chemical structure of a molecule is rearranged. It is generally referred to as a chemical reaction involving a structural modification that occurs spontaneously or catalytically.

Isomerization is a natural process that occurs in a variety of biological systems, including retinal when photopigments react to light. When retinal absorbs light, the retinal molecule undergoes a cis-to-trans isomerization. The conformation of the molecule alters from a bent, unstable conformation to a straight, more rigid one, resulting in the activation of an ion channel in the cell membrane. This, in turn, results in the generation of a visual signal that is sent to the brain, and the sensation of light is perceived.

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What are the 4 parts of the DNA strand?

Answers

The 4 parts are:
2 nucleotide base pairs
1 phosphate group
1 sugar group

what would be the RNA strand produced after transcription?

5' A-T-T-C-G-A-T-G-C 3'

Answers

Your answer for this problem is going to be :T-A-A-G-U-T-U-G
3TTACUGATC I think it’s right

What type of sustainable development encourages enjoyment and conservation of biodiversity and habitats?
a.
Solar energy
c.
Ecotourism
b.
Organic farming
d.
Wind farming

Answers

I believe is organic farming sorry if it’s wrong
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