Answer:
d. Fluoride becomes incorporated into the crystalline structure of teeth, making them less susceptible to decay
Explanation:
Dental caries results when cariogenic (caries-causing) bacteria metabolize carbohydrates or sugars present in the mouth for their energy needs, producing organic acids as byproducts, thus lowering the pH of the plaque biofilm.
The hydroxyapatite of tooth enamel is composed mainly of phosphate ions (PO₄³⁻) and calcium ions (Ca⁺). Under normal conditions, there is a stable equilibrium between the calcium and phosphate ions in saliva and the crystalline hydroxyapatite. At low pH (acidic conditions), there is a shift in equilibrium resulting in the dissolution of hydroxyapatite from tooth enamel, a process known as demineralization. A reverse process called remineralization (the process of incorporation of minerals in tooth enamel) occurs when the saliva, acting as a buffer elevates pH. When equilibrium is shifted to favor continued demineralization, dental caries results.
However, when fluoride is present in saliva, fluorapatite, rather than hydroxyapatite, forms during the remineralization process as fluoride ions replace hydroxyl groups in the formation of the apatite crystal lattice.
Fluorapatite is less soluble than hydroxyapatite making it more resistant to demineralization, even under conditions of low pH. Thus, fluoride acts as an effective anticaries agent.
in what parts of the cycle do you think phosphorus spends the most time
Answer:
what is a phosphorus
Explanation:
amount of force times the distance it moves an object
Answer:
Work
Explanation:
Work=Force*Distance
Note: this is physics, not biology
Which of the following are not examples of renewable resources?
Can someone please help me I have been stack on this question for a while know.
Answer:
Each of the spiders receive different genetic combinations from their parents, and as a result are genetically different from each other.
Explanation:
Figure out which step in the scientific method is being used.
"If eating celery burns more calories than the celery contains, then I will lose weight if I eat lots of celery."
Answer:
Hypothesis
Explanation:
It uses an if then system, which is commonly used when creating hypothesises.
true or false with reason :- partner firm is a non trading concern
Answer:
True
Explanation:
A partnership firm can be said to be a trading business with a maximum limit of ten partners involved in the purchase and sale of goods and services.
Sedimentary rocks such as sandstone often contain cracks or ripples. These marks show that a number of sedimentary rocks form
A. In pockets of molten rock.
B. Inside ice in mountain ranges
C. Under sands in the desert
D. At the bottom of bodies of water
6. Which domain includes all multi-cellular organisms?
a. Eukarya
b. Bacteria
c. Archaea
d. None of the above
Answer:
Eukarya
Eukarya is the only domain that consists of multicellular and visible organisms, like people, animals, plants and trees.
What is the direction of energy flow in an energy pyramid? How much energy is transfered from one step to another?
Answer:
- The flow of energy is from the lowest level (i.e., the base of the pyramid) to highest levels
- Approximately 10 percent
Explanation:
The energy pyramid is a diagram that shows the flow of energy between trophic levels in an ecosystem. Each trophic level is characterized by organisms that play specific roles in an ecosystem, for example, photosynthetic organisms (producers) at the base of the pyramid which represent the source of energy for herbivores localized at a higher level. The amount of energy decreases as it moves to higher trophic levels, approximately 10 percent of the energy is transferred from a trophic level to the next level and the remaining energy is lost as heat.
INTERIM K12 SCIENCE
HERE ARE ALL YOUR AWNSERS
K12 ELA 7th grade science interim
answers are labeled as numbers and letters a b c and d (1c 2d 7a 9b etc)
1A
2C
3D
4C
5B
6B
7B
8A
9D
10C
11D
12C
13C
14B
15B
16B
17A
18A
19C
20C
21B
21B
23B
24C
25B
I FEEL VERY GUILTY AND BAD
YOUR WELCOM
WHO EVER SEES THIS MUST SPREAD IT LIKE HOT BUTTER
Which protein is damaged at the nerve endings during mercury toxicity
a. keratin
b. tubulin
c. pilin
Answer:
b. tubulin
Explanation:
Tubulin is a superfamily of proteins that make up microtubules who have many functions including intracellular trasport of neuron's vescicles
Tubulin protein is damaged at the nerve endings during mercury toxicity.
What do you mean by Mercury Toxicity?Mercury toxicity occurs when an individual is highly exposed to mercury.
The inhalation of mercury vapor can produce harmful effects on the nervous, digestive and immune systems, lungs, and kidneys, and may be fatal. This is considered as one of the severe toxicity that a person suffers.
Tubulin proteins are a very important class of proteins that helps in the formation of microtubules that have numerous functions in our body including the cytoskeletal arrangement of cells, intracellular transport of neuronal vesicles. And when a person suffers from mercury toxicity, such proteins are damaged and result in improper conduction of nerve impulses.
Therefore, Tubulin protein is damaged at the nerve endings during mercury toxicity.
To learn more about Neuronal function, refer to the link;
https://brainly.com/question/13061744
In recent years the elephant population in certain African ecosystems have seen a decreased. The decrease is most likely due tl
Answer:
mostly poaching
Explanation:
i dont know if this was the answer you wanted but...
nvm I had my head on the wrong question
A student drew the following model.
Which phase is the best summary of the model
Please answer this
MARK THEM BRANLIST
ASAP
Answer:
im so so so sorry if this is wrong but im pretty sure its C.
xplanation:
all the others have things they dont
want C. has the best resonings and i definetly
think that is the answer but i ould check just to be sure :D have a great day
You discovered symptoms start to appear on your cattle and its spreading, the symptoms are swollen, fever then death.
Suppose you are a veterinary Doctor, what will you do, what procedures you will apply to examine this disease.?
Answer:
f
Explanation:
PLEASSEEE HELP ASAP THANKS
Answer:
1,3 and 5.............
Determine the rate of oxygen consumption at each temperature for comparison. Then divide the higher rate by the lower rate to obtain the difference (ratio) between the two temperatures. Round your answer to the nearest 0.1. It can be concluded that mouse respiratory rate (increases or decreases) when temperature is lowered. In this experiment there was a fold difference in respiratory rate at the two temperatures.
Answer:
In mice rate of respiration increases as the temperature drops.
Explanation:
As the temperature decreases, the respiration rate also decrease because the body needs less oxygen for the production of energy. But in the case of mice, the rate of respiration decreases and the reason is the fear. Results showed that the respiration increased in mice as the decrease in temperature occur, caused due to the fear instilled in the mice towards cold temperature so in mice rate of respiration increases as the temperature drops.
Which of the following does NOT provide biological evidence for the age of the earth?
Fossil Evidence
Molecular Clocks
Radioactive Dating
Comparative Anatomy
Answer:
Explanation:
Anatomía comparada
describe origin and evolution of early vertebrates
How are the smallest ocean waves produced?
Answer:
Ocean waves are usually formed by a distant wind. ... The area which the wind affects the surface is called the fetch. The larger the fetch, the greater the waves produced. the small waves generated by storm winds are often confused and disorganized.
Explanation:
Answer:
For a wave to effectively be produced there need to be large wind, long period of time and a large distance of water. If they are all reduced, then there would be a reduction in the intensity of the wave.
Explanation:
What happens when you change the material through which a wave travels?
Answer:
Changing the material will speed up or slow down the wave depending on the index of refraction of the material.
The image above depicts a triangular piece of land, ACD, with two roads, segments BE and CF, cutting across the property. The owner wishes to add a fence along segment BC. The entire triangular piece of land is an isosceles triangle in which sides AC and CD both equal 9 miles. Segment CF represents the perpendicular bisector of the 13 mile-long base. If triangles BKC and FKE, formed from the intersection of the two roads, are congruent and segment AE is equal to side CD, what is the length of segment BC?
Select one:
A. 2.5 miles
B. 3.0 miles
C. 3.5 miles
D. 4.0 miles
Answer:
A. 2.5 miles
Explanation:
I completed it n got 100 lol
What is the transfer of
heat from one object to
another through direct
contact?
Answer:
condiction
Explanation:
conduction is the transfer of heat between substances that are in direct contact with each other.
Explain how an abiotic factor (stronger storms, warmer oceans, or lower ocean pH) can affect populations in a coral reef ecosystem
Answer:
Climate change leads to: A warming ocean: causes thermal stress that contributes to coral bleaching and infectious disease.
Explanation:
Sea level rise: may lead to increases in sedimentation for reefs located near land-based sources of sediment. Sedimentation runoff can lead to the smothering of coral.
Ileana crossbreeds two purebred plants, one with dark blue flowers and one
with white flowers. Weeks later, she discovers that all of the offspring have
dark blue flowers. Ileana determines the
A. white flower allele is dominant
B. white flower allele is not inherited
C. dark blue allele is recessive
D. dark blue allele is dominant
Answer:
D
Explanation: it is dominant because the plants didnt show and white
The DNA molecule is genetic material that is-
A. found in the mitochondria, lysosomes, vacuoles, and ribosomes
B.Composed of adenine, uracil, guanine, and cytosine
C. The building block of cellular chromosomes
Really need help
Answer:
C Building block of cellular chromosomes
What is RNA? What similarities does it have to DNA?
Similarities Between DNA and RNA
Both DNA and RNA store genetic information. DNA and RNA are both large biological polymers. Both DNA and RNA consists of sugar, nitrogenous bases, and a phosphate backbone. On both molecules, guanine and cytosine pair with each other (are complementary).
Explanation:
Question 1 of 25
Next
Quit X
Send Message
Which animal will use a hollowed-out tree stump as a home?
O A) a beaver
OB) a bear
OC) an eagle
OD) a rabbit
How are fossil fuels formed from geologic processes?
How are fossil fuels formed from geologic processes?
A. Fossil fuels are formed when mineral deposits are recrystallized due to high temperature and pressure over time.
Fossil fuels are formed when mineral deposits are recrystallized due to high temperature and pressure over time.
B. Fossil fuels are formed when biomass is covered by sediment, and the biomass experiences high temperature and pressure over time.
Fossil fuels are formed when biomass is covered by sediment, and the biomass experiences high temperature and pressure over time.
C. Fossil fuels are formed when tectonic plates slide past one another, creating small rock fragments.
Fossil fuels are formed when tectonic plates slide past one another, creating small rock fragments.
D. Fossil fuels are formed when tectonic plates collide together, forcing rock fragments deep underground.
Answer:
Fossil fuels are formed when mineral deposits are recrystallized due to high temperature and pressure over time.
Fossil fuels are formed when mineral deposits are recrystallized due to high temperature and pressure over time.
Explanation:
How are fossil fuels formed from geologic processes? Fossil fuels are formed when mineral deposits are recrystallized due to high temperature and...
ANSWER
Fossil fuels are formed when biomass is covered by sediment, and the biomass experiences high temperature and pressure over time. The correct option is B.
What are fossil fuels?Coal, oil, and natural gas are fossil fuels formed from the remains of dead plants and animals that were buried in sedimentary rock layers millions of years ago.
Over time, these organic materials are subjected to high temperatures and pressure, resulting in the transformation of organic matter into fossil fuels.
These hydrocarbons migrate through the surrounding rock over millions of years and accumulate in underground reservoirs, where they can be extracted and used as energy sources.
Fossil fuel formation is a slow process that requires specific geological conditions such as the presence of sedimentary rocks, high temperature, and pressure.
Thus, the correct option is B.
For more details regarding fossil fuels, visit:
https://brainly.com/question/3371055
#SPJ2
where does peristalsis first occur in the digestive tract?
esophagus
liver
large intestine
small intestine
Answer:
peristalsis first occur in oesophagus
so, option A is correct