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hodyreva [135]
2 years ago
8

Please answer the following questions correctly​

Biology
1 answer:
Oksi-84 [34.3K]2 years ago
6 0

Answer:

i.   Name each of the parts labelled I, II, III, IV and V.

                           {5 marks}

I - Crown / Enamel

II - Dentine

III - Cement / Periodontal membrane

IV - Jaw bone / Root

V - Pulp Cavity

ii   What is the function of each of the parts labelled I and III?

                    {2 marks}

I - Protects teeth from harmful bacteria

-- Enable teeth withstand pressure of chewing

-- Cutting / chewing / protects dentine / protect pulp cavity

III - hold tooth firmly (in socket / Jaw bone)

iii  Which of the labelled parts could be affected by tooth decay?

                                   {1 mark}

V - Pulp cavity

iv  State three ways by which tooth decay may be prevented.

                      {3 marks}

→ avoid using sharp-pointed objects

→ avoid having dry mouth

→ use water containing fluorides to wash teeth / mouth

→ avoid smoking

→ the teeth should be cleaned regularly after each meal / remove food particle from the teeth / flossing

→ wash the mouth vigorously after each meal

→ regular visit to the dentist

→ avoid eating too hot foods

→ avoid eating too much sugary food

→ avoid eating too cold food / taking too cold drinks

Explanation:

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Answer:

The Clean Water Act (CWA) can be considered as one of the effective program which impacted the water quality in the United States. Under this Act, quality standards for surface water were generated.

This Act has set wastewater standards for the industries and it ensures that industries do not pollute the clean water. The Clean Water Act (ACT) made it unlawful to discharge any pollutant in waters and set a fixed amount for it. Beyond that amount, polluting water is considered to be illegal.

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How does dissolved oxygen levels in the water effects kelp?
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Explanation:

Hope it helps :3

6 0
2 years ago
What is a translation,transcript
Flauer [41]

Answer:

A translation of an academic transcript should be a word-for-word rendering of the document from one language into another. A translation is distinct from a credential evaluation. An evaluation explains the meaning of the transcript.

Explanation:

5 0
3 years ago
Describe the vascular system of plants. Include brief descriptions of the characteristics and function of xylem and phloem.
solong [7]

Answer:

The vascular tissue of the plants distributes water and nutrients, which guarantees a constant growth. Each newly formed cell needs to become the corresponding cell type in vascular tissue.

Explanation:

Like animals, plants need water and nutrients. While animals use a circulatory and digestive system to obtain and distribute nutrients, plants use a vascular system. This system absorbs water, vitamins and minerals from the soil and then transmits energy in the form of carbohydrates to the roots. The main components of the vascular system are the xylem and the phloem.

<u>Xylem</u> is a complex tissue formed by several cell types. Its function is the conduction of water and minerals from the root to the leaves. Among the cells that form this complex tissue differ:

- Conductive cells or tracheal elements: they are dead elements at maturity, they serve for vertical conduction and support

- Vessel members are observed in Angiosperms, the largest plant group with the most recent evolution; They are short, wide cells with thick secondary walls, they differ from tracheids because they are perforated elements.

- Storage elements: parenchymal cells, thick walls, secondary, can present crystals and other cellular contents.

- Support elements: fibers in the Angiosperms and fibrotracheids in Gymnosperms, elements of intermediate characters between the fibers and the tracheids.

<u> Phloem</u> cells conduct food (photosynthesis produced by photosynthesis) from the leaves to the rest of the plant. They are living cells at maturity and in histological preparations colored with Astrablue take the color blue. Phloem cells are located outside the xylem.

The sieve elements of this tissue are: the sieve cells in the Gymnosperms and the members of sieve tubes with their respective accompanying cells in the Angiosperms. The accompanying cells retain their nuclei and control the neighboring sieve tubes. Dissolved food, such as sucrose, circulates through the screened areas that connect these cells to each other.

Being a complex tissue, it also has parenchymal cells for storage and fibers and sclereids as a support.

4 0
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andrezito [222]

Answer:

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7 0
3 years ago
Read 2 more answers
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