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MakcuM [25]
3 years ago
12

When plaque becomes heavy and hardened, it is called dental calculus or _________.

Biology
1 answer:
djverab [1.8K]3 years ago
3 0

Answer:

Tartar.

Explanation:

Dental plaque may be defined as the development of mass or biofilm of bacteria that grows on teeth surface. This plaque may present on teeth, between the teeth and on teeth front.

The plaque is first colorless but when it changes to dental calculus or tartar, the color of plaque becomes yellow or pale brown. This causes dental problem and different dental disease.

Thus, the answer is plaque.

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Phosphorus in rivers can lakes sinks to the bottom and over thousands of years becomes ______ again.
pshichka [43]

Your question isn't the most clear, but I think your answer is rocks, or more specifically phosphorous rich rocks because the phosphorous will mix with the sediments on the river's/lake's ground forming phosphorous rich rocks.

That means that It'll become a phosphate mineral and later become phosphorous again when the minerals weather.



Hope it helped,



BioTeacher101

5 0
3 years ago
Which correctly lists the three zones that further divide the open-ocean zone?
Serga [27]

Answer:

Deep zone, surface zone and transition zone.

Explanation:

Open sea zone is the area of the coastal areas above the sea bed and cover the continental shelf where large Marine organism are present and there is enough sunlight algae organism use to photosynthesize and produce food for the Marine organisms by converting carbondioxide and water into carbohydrates.

The zone stretches from the surface , to the middle and depth of 200 m.

The surface zone is the area where light penetrates most , the transition stretches from the surface zone downward, in this zone light penetrates bit not as much as surface zone and in the deep zone, it stretches from the transition zone downward to a depth of 200 meters and don't have enough light penetration compare to surface and transition.

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3 years ago
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3. What happens to the amount of Ammonium Chloride (NH4)Cl that can dissolve as the temperature decreases?
Nesterboy [21]

as in any liquid, as heat is added, solutions become more capable of holding more dissolved material . (not sure if this is what you're asking as it seems to be missing information)

3 0
2 years ago
What did gregor mendel want to find out when he decided to study pea plants.
Alexxx [7]

Answer:

How traits/characters were passed down and inherited from parents to offspring.

7 0
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Organisms classified as fungi have unique characteristics. Which of the following characteristics is found only in organisms cla
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Answer:

C

Explanation:

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