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forsale [732]
2 years ago
13

Look around you. Observe and list five (5) chemical changes that occur in all forms of matter.​

Biology
1 answer:
stira [4]2 years ago
4 0
  • cooking an egg
  • burning wood
  • digesting food
  • baking cake
  • rusting of iron
  • hope it helps....

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The place or type of ecosystem in which a species lives and obtains what it needs to survive
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you duhhh vfffbbgggb

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3 years ago
Even though scorpions are related to spiders, there are many differences between the two organisms. One difference is that scorp
denis-greek [22]

Answer:

The correct answer is - tissues.

Explanation:

The tissue is an organization of the cells to work together to perform a specific type of function in an individual organ or body system of an organism. The skin cells of the scorpion also organize together to play the role of hard covering that helps the scorpion to be protecting.

This organization of cells is known as carapace which is a tissue made up of cells together to protect scorpion as tissue is a group of similar cells working together.

6 0
2 years ago
What is a change in a DNA sequence called
Shkiper50 [21]
Mutation. this happens when a cell copies its DNA to divide. its more common than you may think, a "typo" occurs every 100, 000 or so nucleotides, thats about 120, 000 "typos" every time a cell divides. 
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2 years ago
Which step in the PCR process will be affected?
Temka [501]

The denaturation step in the polymerase chain reaction will be affected. As a result the DNA strands will not unwind and the DNA will not become single stranded.

<u>Explanation:</u><u> </u>

Polymerase chain reaction is used to synthesize multiple copies of DNA. The technique in molecular biology uses thermal cycling which involves steps of heating and cooling. There are three important steps in PCR.

Nucleic acid denaturation is the first step. In this step the DNA is heated to about 90°c and this causes the denaturation of the DNA. Two strands of DNA get separated. The second step is annealing in which the strands are cooled to 55°c.

During annealing the primers stick to the complementary sites on the DNA to facilitate its replication. The third step is extension in which the temperature of the mixture is raised to 72°c. The tag polymerase will start working on the DNA strands and replicate them.

If the denaturation step is not performed the speration of double stranded DNA into single strands won’t take place.

4 0
3 years ago
You purchased equipment costing $1,000 to use for a lawn-mowing business to earn money for college during the summer. The first
rosijanka [135]

Answer:

$220

Explanation:

For Mowing:

Revenue:                                      $1,200

Additional cost:                              $(100)

Transportation cost :                      $(50)

Net Income               :                  $1050

For Painting:

Revenue:                                      $1,400

Additional cost:                              $(80)

Transportation cost :                      $(50)

Net Income               :                  $1270

Incremental Net income =   $1270 -  $1050

                                            = $220

7 0
3 years ago
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