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BaLLatris [955]
3 years ago
14

3. An osmosis investigation was conducted using chicken eggs to represent cells with semi-permeable

Biology
1 answer:
lana [24]3 years ago
4 0

Answer:

Explanation:Water enters the cell when placed in environments of high water concentration.

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Plants have chloroplasts and mitochondria. What is the purpose of mitochondria when a cell already has chloroplasts?
slega [8]

Answer:

To turn sugars into energy

Explanation:

\bf{ \underline{ \large{Functions \:  of  \: Mitochondria}}}

  • Mitochondria are main sites of aerobic respiration. They are miniature biochemical factories where food stuffs are completely oxidised to carbon dioxide and water.
  • The energy (ATP) produced in the mitochondria helps to perform various energy requiring processes.
  • Because of the formation of ATP in mitochondria it is called power house of the cell.

\bf{ \underline{ \large{Functions \:  of  \: Chloroplast}}}

  • Photosynthesis: Light reaction (in thylakoids), Dark reaction (in stroma).
  • Storage of starch.
4 0
2 years ago
Biologic agents differ from other injurious agents in that they are able to replicate and can continue to produce their injuriou
Nostrana [21]

The question is incomplete as it does not have the options which are:

A. Gram-negative bacilli cannot cause harm to the cell; only Gram-positive bacilli can harm the cell.

B. Gram-negative bacilli release endotoxins that cause cell injury and increased capillary permeability.

C. Gram-negative bacilli excrete elaborate exotoxins that interfere with cellular production of ATP.

D. Gram-negative bacilli enter the cell and disrupt its ability to replicate.

Answer:

B. Gram-negative bacilli release endotoxins that cause cell injury and increased capillary permeability.

Explanation:

Gram-negative bacteria are pathogenic in nature due to the composition of their cell wall. Their cell wall contains an additional layer of a molecule called lipopolysaccharides or LPS.

The LPS layer is toxic in nature and is known as endotoxin and is involved in the pathogenicity of the bacteria as the toxin causes the injury to the Endothelial cell membrane of the host cell.  

When the bacteria cell is lysed and the LPS circulates in the blood, then LPS binds the receptors and acts on CD14. This attracts the neutrophils at the site and can cause vascular injury due to increased capillary permeability.

Thus, Option-B is the correct answer.

5 0
3 years ago
Which hormone is synthesized and secreted by the kidneys?
Artist 52 [7]
Erythropoietin is the answer hope it helps.  

5 0
3 years ago
PLEASE HELP!!!!!!!!!!!! WILL MARK BRAINLIEST
DENIUS [597]

Answer:

This is an example of biotechnology because it seeks to solve a societal problem using biological entities.

Explanation:

I don't really have an explanation but basically, your solving a societal problem and to solve it your using biological entities.

I hope this helps!

(And also, i really don't care about being marked as Branliest. You can do it if you <em>want</em> but i just help people because i like it :)

3 0
3 years ago
Read 2 more answers
What role do histones play in a cell
igor_vitrenko [27]

Answer:

Their function is to package DNA into structural units called nucleosomes. Histones are the main proteins in chromatin. Chromatin is a combination of DNA and protein which makes up the contents of a cell nucleus. Because DNA wraps around histones, they also play a role in gene regulation.

I hope this helped and is the right answer.

-Jarvis

6 0
2 years ago
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