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zysi [14]
3 years ago
10

All cells are surrounded by a cell wall​

Biology
2 answers:
fredd [130]3 years ago
6 0

Answer:

Yes, that's correct... Is there a question???

DedPeter [7]3 years ago
3 0
Only cells in plants are surrounded by a cell wall. Cells in animals however doesn’t have a cell wall but only is surrounded by the cell membrane. Plants also have a cell membrane.
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please help!!!what is the most likely source of the increase in carbon dioxide in the atmosphere shown in the graph above
ICE Princess25 [194]

oh this is super easy, I can solve it for you.


7 0
3 years ago
If you exercise at an intensity of 1 liter of oxygen per minute, about how many calories would you burn in one hour?
ANTONII [103]
When exercising carbohydrates an fats are oxidized to release energy used by muscles, during this oxidation 1 liter of oxygen is equivalent to approximately 5 calories. Therefore if one liter of oxygen is consumed every minute during exercise, then in an hour 60 liters of oxygen will have been used. But since one liter of oxygen is equivalent to 5 calories, then in an hour 300 calories will have burned.
4 0
3 years ago
Read 2 more answers
A hypothesis is a general principle or explanation that is derived from observations. Suppose you make the following observation
mr_godi [17]

Question continued

For each statement below, mark "True" if it would be a valid hypothesis, based on these three observations alone, and mark "False" if it would not be a valid hypothesis.

1. The onion cells I looked at have a nucleus.

2. All onion cells have a nucleus.

3. All cells have a nucleus.

4. Some cells have a nucleus.

5. Only onion cells have a nucleus.

6. If I look at 10 skin cells from my hand, each one will have a nucleus.

Answer:

1. The onion cells I looked at have a nucleus. false - this is not a hypothesis, it is an observation of the evidence you collected.

2. All onion cells have a nucleus. true - this is a valid hypothesis based on the evidence you have gathered from looking at onions

3. All cells have a nucleus. true  - this is a hypothesis based on you looking at 3 cell types, several samples of each, and finding that they all have a nucleus

4. Some cells have a nucleus. false - this is not a valid hypothesis. Your evidence so far suggests all cells have a nucleus

5. Only onion cells have a nucleus. - false, you know this to be false as other cell types you analysed had a nucleus

6. If I look at 10 skin cells from my hand, each one will have a nucleus. false - a hypothesis is supposed to be a general principle that is backed up by evidence, this is too specific.

4 0
3 years ago
A model organism is a species that researchers study to better understand certain biological processes. Mollusks and arthropods
laila [671]

Hey there Brainly peep!

They can respond to changes in their environment which the answer is  

D. Mollusks and arthropods can respond to changes in their environment, while jellyfish and sponges cannot.


Hope this helped

8 0
3 years ago
Read 2 more answers
Breathing into and out of a paper bag for a long period of time will lead to?
Ilya [14]

Breathing into and out of a paper bag for a long period of time will lead to respiratory acidosis.

<h3>What is respiratory acidosis?</h3>
  • When the lungs are unable to expel all of the carbon dioxide the body produces, a condition known as respiratory acidosis develops.
  • Body fluids, particularly the blood, become too acidic as a result.
  • The main causes of respiratory acidosis are inadequate ventilation and carbon dioxide buildup.
  • The main issue is an increase in arterial carbon dioxide partial pressure (pCO2) and a decline in the arterial bicarbonate to arterial pCO2 ratio, which causes a drop in blood pH.
  • When there is acute respiratory acidosis, the body initially tries to make up for it.
  • If the acidosis lasts more than 12 hours, a reaction known as metabolic compensation2 takes place.
  • By increasing the release of hydrogen ions through ammonium, the kidneys will lower the blood's acidity.
  • Too much carbon dioxide in the body can result in general symptoms including headache, exhaustion, and twitching muscles.
  • Frequently, it goes away fast on its own.
  • But in cases of severe hypercapnia, the body is unable to return to a stable CO2 level, and the symptoms are more severe.

Learn more about respiratory acidosis here:

brainly.com/question/9694207

#SPJ4

7 0
2 years ago
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