Answers
The Kjeldahl method is a chemical process that involves digesting the food sample with sulfuric acid, which converts the nitrogen content in the protein to ammonium sulfate.
What is an acid ?An acid is a chemical substance that donates positively charged hydrogen ions (H+) when it dissolves in water. Acids have a pH level lower than 7 on a pH scale, which ranges from 0 to 14. The greater the concentration of H+ ions in a solution, the more acidic it is.
Acids can be found in both natural and man-made substances, and they can be classified as either strong or weak based on their ability to donate H+ ions. Strong acids, such as hydrochloric acid (HCl), sulfuric acid (H2SO4), and nitric acid (HNO3), donate H+ ions readily and can completely dissociate in water. Weak acids, such as acetic acid (CH3COOH) and carbonic acid (H2CO3), donate H+ ions less readily and only partially dissociate in water.
Acids can react with bases to form salts and water in a process known as neutralization. This reaction involves the transfer of H+ ions from the acid to the base, resulting in the formation of salt and water.
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Related Questions
1. Muscles move tendons attached to bone by performing an action called _______.
2. Myosin and ______ are two proteins that interact to contract muscles.
3. _______ connect muscles to bones.
4. The layer of skin that grows new cells rapidly is called the _______.
5. The _______ is the layer of skin that regulates body temperature.
6. _______ can occur when pores become clogged with dirt or oil, or become infected.
7. Explain what happens at a microscopic level inside a muscle fiber during contraction, beginning with the nerve impulse.
Answers
1. Contraction
2. Actin
3. Tendons
4. Epidermis
5. Dermis
6. Acne
7. A nerve signal from the brain arrives at the intersection of the nerve and muscle cells and releases acetylcholine from the neuron. This triggers chemical changes in the muscle cell involving ions, including Ca2+. Calcium triggers the thick filaments, made of myosin, to attach to the thin filaments, made of actin, in the muscle cell, and the myosin pulls the actin toward the center of the muscle cell. ATP causes the release of the actin fibers, allowing the muscle to relax and the process to begin again.
For Penn Foster.
Answer:
1. Contraction
2. Actin
3. Tendons
4. Epidermis
5. Dermis
6. Acne
7. A nerve signal from the brain arrives at the intersection of the nerve and muscle cells and releases acetylcholine from the neuron. This triggers chemical changes in the muscle cell involving ions, including Ca2+. Calcium triggers the thick filaments, made of myosin, to attach to the thin filaments, made of actin, in the muscle cell, and the myosin pulls the actin toward the center of the muscle cell. ATP causes the release of the actin fibers, allowing the muscle to relax and the process to begin again.
Explanation:
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Which phylum did you find the most animals (i.e., greatest number of different species)
for? Which phylum was the most difficult to find? Were there some phylum that you
could not find at all? How diverse do you think animals are in your region? Did you
consistently find certain animals in a specific type of microhabitat?
Answers
The phylum with the greatest number of different species: Generally, the Phylum Arthropoda (which includes insects, spiders, and crustaceans) has the highest number of species globally.
The difficult phyllumThe most difficult phylum to find: This would depend on the specific region and habitat. Some phyla like Porifera (sponges) or Echinodermata (starfish, sea urchins) might be hard to find in a terrestrial environment because they're primarily marine.
Phyla you could not find at all: This again would depend on your location. If you're not near a body of water, you're unlikely to find any members of the Phylum Cnidaria (jellyfish, corals, sea anemones) or Phylum Mollusca (squid, octopus, snails) for example.
Animal diversity: Diversity varies greatly depending on the region. Biodiversity hotspots, such as rainforests or coral reefs, have a high level of species diversity. Conversely, more extreme environments like deserts or polar regions have less diversity.
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What could a scientist do to determine what era the Eocene period belongs to on the geologic time scale?
learn what happened during Precambrian time
study information related to the Cenozoic era
view the timing of events in the Mesozoic era
research events that happened during the Paleozoic era
Answers
The Eocene occurred during the Terciaty period. To determine the era the Eocene period belongs to, a scientist should study information related to the Cenozoic era. Option B).
What is the Cenozoic?The Cenozoic is an era that covers the period from 65 million years ago to the present.
Significant events during the period,
During this era, there is a decrease in temperature (which until that moment was significantly higher than the current temperatures) and begins an aridity process.Since most cretaceous plant species got extinct, there is significant radiation of angiosperm and their consequent domain on the ground.
Following this diversification, different insects evolve following the different types of plants. Coevolution and pollination acquire protagonism.
During this period, mammals radiated too, originating in the current region of China.
Occurs the evolutive radiation of teleosts and birds.
The Cenozoic era includes the tertiary and quaternary periods.
⇒ Tertiary
Paleocene (65-55 my ago)Eocene (55-33 my ago)Oligocene (32-23 my ago)Miocene (23-5 my ago)Pliocene (5-2 my ago)
⇒ Quaternary
Pleistocene (2-0.02 my ago)Holocene (0.02 - 0 my ago)Since the Eocene occurred during the Terciaty period (Cenozoic era), to determine what era the Eocene period belongs to on the geologic time scale, a scientist should study information related to the Cenozoic era. Option B).
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List 3 commercial uses of sponges
Answers
The Ceramic industry. It is used for finishing on the lathe machine. ...
Home decorating/painting. The sponge buffering is a colouring technique used in DIY on furniture and accessories and on large surfaces such as walls and ceilings. ...
Footwear Manufacturers.
Answer:
Some commercial uses of sponges are
Personal hygiene: The sponge has many natural properties. It retains water, does not drip and releases water only when slight pressure is applied. Many people prefer to purchase the natural sea sponge because of its characteristics for deep cleansing the face, its ecological properties and most of all does not give allergic reactions.
Decor : In private homes, in hotels and on yachts, it is very common to see displays of natural sponges as part of furnishing.
Painting: The sea sponge is used in the restoration of art, for dry cleaning of frescoes and paintings
Hope this helps!
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If you observed that the Sun did not set during an entire 24-hour period of time during the summer months of June, July, and August, where are you most likely located?
South Pole
a location in the mid-latitudes
North Pole
near the Equator
Answers
Sun did not set during an entire 24-hour period of time during the summer months of June, July, and August, you are most likely located at the North pole.
The sun does not set above this latitude during the summer because of the Arctic Circle Phenomenon. The Arctic Circle is a fictitious boundary. The Arctic Circle's North Pole experiences extended periods of continuous sunshine, mostly in the months of June, July, and August. The reason for this is that Earth's axis is slanted by 23 degrees, and during the summer months when it rotates, the North Pole aligns with our star. For instance, the farthest reaches of Norway.That is why during the summer months of June, July, and August, the Sun did not set for a full 24 hours.
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Hagfish are noted for having a skull, but no . . . A. pharyngeal slits.
B. vertebral column.
C. brain.
D. tail.
Answers
Answer:
but no the answer is spine which can also be called vertebral column so is B
Answer:
B. Spine/vertebral column.
Explanation:
xXMonkey here! Hagfish have no vertebral column. If I got this wrong, please let me know.
exaplian two situations on a pedigree that would allow you to determine the genotype of an induvudal with the dominant phenotype
Answers
1. If the individual with the dominant phenotype has an affected parent with a recessive phenotype.
2. If the individual with the dominant phenotype has affected offspring with a recessive phenotype.
In a pedigree, two situations can help determine the genotype of an individual with a dominant phenotype.
1. If an individual with the dominant phenotype has offspring with a recessive phenotype, it indicates that the individual must be heterozygous (carrying one dominant and one recessive allele).
This conclusion is drawn because the recessive phenotype can only be expressed when an individual has two copies of the recessive allele.
2. Another situation is when both parents have the dominant phenotype, but they produce offspring with the recessive phenotype.
This scenario suggests that both parents are heterozygous (carrying one dominant and one recessive allele), and the recessive phenotype appears in their offspring due to the inheritance of two recessive alleles.
By analyzing these patterns in the pedigree, we can make inferences about the genotype of individuals exhibiting dominant phenotypes.
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Now I know that plate movements create new features by?
I NEED HELP PLS ASAP
Answers
Answer:
Explanation:fluids are released from the rock causing the overlying mantle to partially melt
which cause new magma
Fluids released from the rock cause the mantle above to partially melt as the sinking plate descends deeper into the mantle.
What additional features are produced by plate movements? Fluids released from the rock cause the mantle above to partially melt as the sinking plate descends deeper into the mantle.Along the convergent boundary, the fresh magma (molten rock) rises and may erupt violently to create volcanoes, frequently creating arcs of islands.By illuminating how the shifting of geologic plates generates earthquakes, volcanoes, and mountain formation, the idea of plate tectonics transformed the field of earth sciences.It is believed that convection currents in the molten rock in the Earth's mantle beneath the crust are what are moving these tectonic plates.This tectonic activity produces earthquakes and volcanoes as short-term effects.Entire continents have moved over millions of years as a long-term consequence of plate tectonics.To learn more about plate movements refer
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Click to select the correct answers. Click again to unselect answers. Leave the incorrect answers unselected.
Mutations can be classified by their effect on the DNA sequence or the resulting protein. The triplet nature of the genetic code means that base changes within coding sequences can have several different outcomes.
Which of these correctly describes the effects of the different types of mutations.
Choose three that apply.
Responses
A missense mutation results from the substitution of one base, changing an amino acid to another amino acid, possibly affecting protein function. The effects of this mutation can be positive, negative, or neutral.
B frameshift mutation results from the deletion or insertion of a base or bases, resulting in a change to the amino acid sequence following the mutation. The results of this type of mutation often depend on the location in the sequence where it occurs.
C nonsense mutation changes an amino acid to a STOP codon, resulting in a change to the sequence the amino acid chain.
D frameshift mutation results from the deletion or insertion of a base or bases, resulting in a change to the amino acid sequence following the mutation. These mutations are always lethal.
E silent mutation involves a substitution of one base, but does not change the amino acid, resulting in the same protein. The results of this mutation is most likely neutral.
Answers
The options that correctly describes the effects of the different types of mutations are:
(a) Missense mutation results from the substitution of one base, changing an amino acid to another amino acid, possibly affecting protein function. The effects of this mutation can be positive, negative, or neutral.
(b) Frameshift mutation results from the deletion or insertion of a base or bases, resulting in a change to the amino acid sequence following the mutation. The results of this type of mutation often depend on the location in the sequence where it occurs.
(c) Nonsense mutation changes an amino acid to a STOP codon, resulting in a change to the sequence the amino acid chain.
What is mutation?A mutation is a DNA sequence change in an organism that occurs due to some mistakes when the DNA was being copied, being exposed to radiations or other factors of the environment.
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The statements that correctly describes the effects of the different types of mutations are as follows;
Silent mutation involves a substitution of one base, but does not change the amino acid, resulting in the same protein. The results of this mutation is most likely neutral (option E).Frameshift mutation results from the deletion or insertion of a base or bases, resulting in a change to the amino acid sequence following the mutation. These mutations are always lethal (option D)A missense mutation results from the substitution of one base, changing an amino acid to another amino acid, possibly affecting protein function. The effects of this mutation can be positive, negative, or neutral (option A). What is mutation?Mutation is any alterations or changes to the genetic sequence of DNA.
According to this question, mutations can be classified by their effect on the DNA sequence or the resulting protein. These classification is as follows;
A frameshift mutation is a deletion or insertion of one or more nucleotides that changes the reading frame of the base sequence. Deletions remove nucleotides, and insertions add nucleotides. Silent mutations are mutations in DNA that do not have an observable effect on the organism's phenotypeMissense mutation is a genetic alteration in which a single base pair substitution alters the genetic code in a way that produces an amino acid that is different from the usual amino acid at that position.Learn more about mutation at: https://brainly.com/question/17130462
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a coyote captures kills and eats a rabbit. what type of symbiotic relationship is this
Answer option
Predator-prey relationship
Mutually beneficial relationship
Competitive relationship
Parasitic relationship
Answers
4. Describe what has to happen for a plant to convert the energy in sunlight into ATP
Answers
Answer:
During the process of photosynthesis,lights penetrates the cell and passes into the chloroplast. The light energy is intercepted by chlorophyll molecules on the granal stacks. Some of the light energy is converted to chemical energy. During this process, a phosphate is added to a molecule to cause the formation of ATP.
Explanation:
hope it helps...
Nature overcomes some natural disasters such as when a flooded mangrove forest or a Burnt forest are reborn study the photos on the right and give examples of how an old ecosystem might be destroyed and make way for a different ecosystem
Answers
Another example is a wildfire. Wildfires can burn through forests and grasslands, destroying existing vegetation and wildlife. However, some plant species are adapted to survive wildfires, and their seeds may remain in the soil or be released after the fire. These plants can quickly grow back and start to rebuild the ecosystem. The burned areas can also become home to new plant species that thrive in the nutrient-rich soil that results from the fire.
A third example is a flood. Floods can inundate an area and destroy existing vegetation and wildlife. However, in areas like wetlands and mangrove forests, floods can also bring in new nutrients and sediment, creating new habitat for different plant and animal species. The flooded areas can also become breeding grounds for fish and other aquatic species, leading to the formation of a different ecosystem.
Which of the following is NOT one of the three parts of the Modern Cell Theory?
Answers
Which condition best represents homeostasis?
having a heart attack
bleeding to death
sweating on a hot day
fracturing a limb
Answers
what is an example of environmental mutation?
Answers
Answer:
Radiation is a type of environmental mutagen. It can cause cells to re arrange. There are many examples of radiation in our environment.
You and your friends are planning a hiking / camping trip to Denali National Park,
Alaska. Below is a topographic map that shows the mountain range in the park. The
wind usually blows in the direction the arrows are pointing. If you want to stay as dry
as possible (no precipitation), which site would be the better choice to set up camp?
Answers
Answer: Site B
Explanation: I took the test。
what makes you believe that the vegetation has been grown by farmers and has not grown naturally by itself over time
Answers
Organized patterns, irrigation systems, specific crop varieties, and agricultural practices indicate human intervention in vegetation growth, suggesting farming activity.
Determining whether vegetation has been grown by farmers or has grown naturally over time can be assessed by considering various factors. Firstly, the presence of organized patterns or rows of crops suggests intentional cultivation by farmers. The use of irrigation systems, terraces, or other agricultural infrastructure further supports human intervention. Additionally, the selection of specific crop varieties or the presence of non-native plant species may indicate deliberate cultivation. Observation of crop rotation, weeding, and fertilization practices can also provide evidence of human involvement. Historical records or local knowledge of agricultural practices in the area can provide further context. Conversely, natural vegetation tends to exhibit a more random distribution and includes a diverse range of native plant species. Considering these factors collectively can help differentiate between vegetation that has been grown by farmers and vegetation that has naturally grown over time.For more such questions on Vegetation:
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Need this asp
Nucleotides contain sugar, a phosphate group, and a nitrogen base. Which of the following is a nitrogen base? (1 point)
A. ribose
B. tyrosine
C. deoxyribose
D. guanine
Answers
Answer:
D
Explanation:
Guanine is a nitrogen base
Which action can humans take to reduce wave erosion?
Answers
Recently, oil from rectangle resulted in a disaster and ecosystems containing many unique species. The potential loss of these species could result in
Answers
The potential loss of unique species due to a disaster is referred to as mass extinction. When large numbers of species disappear over a short time period then it is called mass extinction.
Biodiversity threats include burning fossil fuels and deforesting forests and other wildernesses for industrial agriculture. Other human activities, such as wildlife poaching and hunting, can also have serious impacts.
When ecosystem services no longer adequately meet social needs, biodiversity loss can have far-reaching, direct human health consequences. In addition, ecosystem services impact indirectly on livelihoods, incomes, local migration, and, in some cases, political conflict.
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How does the current affect plankton and nekton life?
Answers
Answer:
Advection by ocean currents modifies phytoplankton size structure at small scales (1–10 cm) by aggregating cells in different regions of the flow depending on their size. This effect is caused by the inertia of the cells relative to the displaced fluid
Molybdenum has an atomic number of 42. Several common isotopes exist, with mass numbers of 92, 94, 95, 96, 97, 98, and 100. Therefore, which of the following can be true? A) The isotopes of molybdenum can have between 50 and 58 protons.
B) Molybdenum atoms can have between 50 and 58 neutrons.
C) The isotopes of molybdenum have between 50 and 58 protons and have different electron configurations.
D) The isotopes of molybdenum have between 50 and 58 neutrons and have different electron configurations.
E) The isotopes of molybdenum have different electron configurations.
Answers
The true about molybdenum, it has an atomic number of 42, several common isotopes exist, with mass numbers from 92-100, and molybdenum atoms can have between 50 and 58 neutrons (option A)
Keep in mind that the atomic number is equal to the number of protons.
Molybdenum, with an atomic number of 42, also has 42 protons.
The mass = number of protons + number of neutrons.
So, if the mass number of molybdenum is 92, the eutrons = 92 - 42
= 50.
And if the mass number is 100, the neutron:
= 100 - 42
= 58
As a result, molybdenum atoms can contain between 50 and 58 neutrons.
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How do the circulatory and respiratory systems play a role in track and field?
Answers
Answer:
Track and field requires a lot of running
Explanation:
When someone runs, blood needs to be circulated throughout the whole body. Constant blood is pushed throughout the body due to blood vessels in our circulatory system. The heart pumps faster so more blood is produced. Oxygen is needs to be reached to muscles. When someone runs, they tend to breathe heavier. Heavy breathing and more breathing is done by the respiratory system. Lungs need to filter air and therefore the respiratory system works hard as well
Why is it said that natural selection acts on phenotypes rather than on the genetic material of organisms?
Answers
Answer:
It's because an organism's phenotype, or physical traits, are what truly decide whether it can reproduce and pass on its genotype to the following generation.
Because the phenotype of an organism represents the alleles that are actually expressed in that organism, natural selection affects that phenotype.
Explanation:
You go to the gym every day, and the workout always makes you very thirsty. You play the same list of songs every time you work out. After listening to these songs during your workout for many days, you notice that whenever you hear one of the songs outside the gym, you suddenly grow very thirsty. In this scenario, what is the conditioned stimulus?
a) the workout
b) the thirst
c) the gym
d) the music
Answers
Your body attempts to restore to its ideal temperature by sweating during activity. You lose bodily fluid while also removing heat from the body when sweat evaporates from your skin.
Does exercising increase your thirst?Exercise. While working exercise is excellent for your body overall, it can also make you excessively thirsty. Sweating is normal after a challenging workout or early-morning run. You run the danger of being dehydrated while your body cools itself off by sweating.
Why do bodybuilders lose fluids?Dehydration is a popular bodybuilding technique used to "dry out" the muscles and increase their size.
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A gap in the geologic record that occurs when sedimentary rocks cover an eroded surface is called a(n)
*
1 point
Intrusion
Unconformity
Fault
Extrusion
Answers
5 When an animal eats food stays in the stomach for a period of time. When a unicellular organism such as paramecium takes in food the food is stored in which organelle? Vacuole LIGHT BLUE Chloroplast YELLOW Cytoplasm ORANGE
(pls help!!)
Answers
When a unicellular organism, like Paramecium, gets in food, the food is contained in Vacuole organelle.
What is unicellular organisms?A single cell tries to make up an organism, which is called as a unicellular organism. This means that all aspect of life—including reproduction, feeding, digestion, and excretion—takes place within a single cell. Plankton, bacteria, and amoebas are some example of unicellular organisms.
What is distinction among unicellular and multicellular?Multicellular creatures use a variety of cells to perform their many functions, in comparison to unicellular organisms, which consist of just one cell that performs all of the processes required by the organism. Among the unicellular organisms are yeast, protists, and bacteria.
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Della and Nick drove at constant
speed from town A to town B along
the same road. The distance between the
two towns was 210 km. Nick left
Town A half an hour later than Della
Both of them arrived in Town B at
the same time . Della drove at a
Speed of 60 km/h Find Nick's speed.
Plzz help mee
Answers
Answer:
70 km/hr
Explanation:
Distance between town A and B = 210 km
Della's speed = 60 km/hr
Time taken by Della = distance / speed
Time taken by Della = 210 km / 60km/ hr
Time taken by Della = 3.5 hours
Since Nick left half an hour later Than Della ;
Then, Nick's travel time = 3.5 - 0.5 = 3 hours
Nick's average speed = Distance /time
Nick's average speed = 210 / 3 = 70km/hr
Major surface current of the ocean or show in the diagram ocean currents affect weather in patterns by
Answers
By moving warm water and precipitation from the equator to the poles and cold water from the poles back to the tropics, ocean currents function much like a conveyer belt. As a result, currents control the climate globally, helping to balance out the unequal distribution of solar energy that reaches the surface of the Earth.
How are ocean surface temperatures impacted by ocean currents?By moving warm water and precipitation from the equator to the poles and cold water from the poles back to the tropics, ocean currents function much like a conveyor belt. In order to balance out the unequal distribution of solar energy reaching Earth's surface, ocean currents govern the global climate.
Vertical shifts are referred to as upwellings or downwellings, while horizontal motions are known as currents. The transmission is made possible by this abiotic mechanism.
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enzymes are a type of protein that act as a catalyst to speed up chemical reactions, however, when the reaction is complete the enzyme is destroyed.True or False?
Answers
The given statement is false. Enzymes are a type of protein that act as a catalyst to speed up chemical reactions, but they are not destroyed when the reaction is complete.
Enzymes work by lowering the activation energy required for a reaction to occur, which speeds up the reaction. After the reaction is complete, the enzyme remains intact and can be used again to catalyze another reaction.
Some enzymes are modified in the process of catalyzing a reaction, but they are not destroyed. This ability to be reused is what makes enzymes so important in metabolic processes and why they play a central role in cellular metabolism.
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