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Thepotemich [5.8K]
2 years ago
11

Explain how structure of cell wall in xylem tissue enables it to be strong and flexible?

Biology
1 answer:
Drupady [299]2 years ago
8 0
The walls of xylem cells are lignified (strengthened with a substance called lignin ). This allows the xylem to withstand pressure changes as water moves through the plant.

The cell membrane is flexible because of the presence of oil like substances called phospholipids, which gives it a fluid nature. While as the cell walls are rigid because of the presence of the thick layers of the substances like cellulose in plants, chitin in fungi and peptidoglycon in bacteria.
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Dr. Bob hypothesizes that drug X causes cuts to heal more quickly. He performs a medical experiment on a group of 100 people and
katrin2010 [14]

Answer:

The correct answer will be option-D.

Explanation:

In the given question doctor used the scientific method to understand and explain the natural phenomenon.

The scientific method involves various steps like making an observation followed by background research, predicting a hypothesis and performing tests to test the hypothesis. These steps have been performed by the doctor.

After these steps the doctor will analyse the result and reach to the conclusion. This would be followed by publishing the results in a scientific journal where it would be reviewed by the fellow scientists.

Therefore, the next step will be publishing the result and thus option-D is the correct answer.

3 0
3 years ago
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Which human activities would most likely increase turbidity? Check all that apply.
olasank [31]

Answer:

C

Explanation:

7 0
3 years ago
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Did you model weathering, erosion, or both in this lab? Give an example of a step of the lab in which you modeled a process to s
kolezko [41]

Modeling of weathering and erosion can be performed in lab.

<h3>Procedure of Modeling Weathering and Erosion using graham cracker:</h3>

1. Fill the ice cube tray or other tiny containers with 100 drops of water in each of the two or three cells using the eyedropper. Make the water entirely solid by freezing it for however long(for 3-4 hrs.).

2. Insert one graham cracker section into the bowl. To create a ramp-like structure out of the Graham Cracker, place one end on the bowl's lip and the other end at the bottom. To secure the cracker to the side of the bowl, dab some icing on the back of the cracker.

3.Add water to the eyedropper. Hold the dropper at a height of about 1 inch above the cracker's top. the dropper over the cracker in the middle. Apply 100 drips, always aiming for the same area.

4.Keep an eye on what the cracker does. Keep a record of your findings.

5. Pour the water into a glass that is clear after removing the Graham cracker. Make notes about the water, grading its cloudiness among your observations.

6.In the same manner as in step 2, clean and dry the bowl and add a Graham cracker to it. Grab an ice cube and wipe it over the graham cracker until it melts completely.

7.Remove the graham cracker and pour the melted water into the clear glass.

<h3>Result:</h3>

Appearance of water collected after is moved across graham cracker.

Learn more about weathering and erosion here:

brainly.com/question/829782

#SPJ10

5 0
2 years ago
Describe rainforests. Include how much rain they get, general location and temperature.
Vera_Pavlovna [14]

Answer:

The average temperature in tropical rainforests ranges from 70 to 85°F (21 to 30°C). The environment is pretty wet in tropical rainforests, maintaining a high humidity of 77% to 88% year-round. The yearly rainfall ranges from 80 to 400 inches (200 to 1000 cm), and it can rain hard

Explanation:

6 0
3 years ago
How is the body of a molluscs organized
a_sh-v [17]

Bodies of molluscs are subdivided into three parts:

*The head that contains the sensory organs and the mouth that contains the radula and odontophores (absent in bivalves).

*The foot is a muscular organ, typical of molluscs, intended for locomotion. It has different shapes depending on the species.

*The visceral mass, as the name suggests, contains the viscera. It is contained in a thin tunic called the coat. It is the mantle that secretes the shell of most molluscs, which serves as protection and / or skeleton and / or regulator of flotation.

Between the mantle and the visceral mass, the pallial rim constitutes a pallial cavity that protects the respiratory organs, and where the metanephridia (excretory organs), the intestine and the genital ducts open.

6 0
3 years ago
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