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stepan [7]
2 years ago
11

Mixing carbon and iron to make steel is a physical change or chemical change ​

Biology
1 answer:
ICE Princess25 [194]2 years ago
4 0
Its a physical change!
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TGGTATCCAT of a coding strand of a gene is​
serg [7]

Answer:

i don't get it , more info ?

Explanation:

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Can a single-celled organism contain tissues? explain.
galina1969 [7]

No.Tissue is a group of cells.If the organisms is single called,it can't form a group to make tissues.

6 0
3 years ago
Which part of the cell theory do these results most support:
Vlad1618 [11]
<h2>Hey There!</h2><h2>_____________________________________</h2><h2>Answer:</h2><h2>_____________________________________</h2>

\huge\textbf{Cell Theory}

the Cell Theory was give by German scientists, Schleiden and T.Shwan in 1839. It stated that,

  • All organism are composed of one or more cells

  • The cell is the structural and functional unit of life
  • It is a de novo structure, that means it COULD arise from non living thing which was incorrect.

It was corrected by the German pathologist  Rudolf Virchow in 1855. He made a convincing case, corrected and added the third point of the cell theory. It is,

  • Cells can arise only by a division of pre-existing cell. It is <u>NOT</u> a de novo structure.

Cell theory brought a great evolution in the field of biology which established the function of organism is the result of activities and interaction of the cell units.

<h2>_____________________________________</h2>

\huge\textbf{Question:}

  • <u>Flask 1</u>: It is observed that there are no micro-organism, this is because the meat is sealed and no micro-organism could enter through it.
  • <u>Flask 2</u>: It is observed that there are micro-organism present because meat is not sealed but open.
  • <u>Flask 3</u>: As the S tube is used, the micro-organism are not able to reach the meat because of the curvy path

These observations support the  point that<u> cells could arise only by a division of pre-existing alive cells</u> because in Flask 1 when there were no micro-organism present so there was no organisms found so no micro-organism arised, In flask 3 the S tube was used so no micro-organism could reach the meat thus there were no organism there which could divide to reproduce. The flask 2 was open, so the micro organisms reached the meat so they divided which means Cells can only arise by a division of pre-existing cells.

<h2><u>_____________________________________</u></h2><h2>Best Regards,</h2><h2>'Borz'</h2>

3 0
3 years ago
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Matching Responses and Stimuli
lora16 [44]

Answer:

smelling rotten eggs - covering your nose

touching a hot dish - pulling your hand away

jumping into a cold pool - shivering

Explanation:

<u>A stimulus generally refers to a detectable change in the environment of an organism. These changes could be physical or chemical and could be in the internal or external environment of organisms. </u>

Organisms react to changes in their internal or external environment by responding appropriately. Hence perceiving the smell of rotten egg, feeling the hotness of a dish by touching it, and feeling cold immediately one jumps into a cold pool are all examples of stimuli and their corresponding responses would be covering one's nose, pulling the hand away, and shivering of the body in order to counter the cold.

In other words:

<em>smelling rotten eggs - covering your nose</em>

<em>touching a hot dish - pulling your hand away</em>

<em>jumping into a cold pool - shivering</em>

5 0
3 years ago
How could wetland restoration affect humans who live in the area? How might it affect native wildlife? (Consider both positive a
harkovskaia [24]

Answer:

Loub

Explanation:

8 0
2 years ago
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