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kakasveta [241]
3 years ago
11

What does the PCR do

Biology
1 answer:
schepotkina [342]3 years ago
8 0

Answer: It is a technique used to amplify a segment of DNA of interest or produce lots and lots of copies. In other words, PCR enables you to produce millions of copies of a specific DNA sequence from an initially small sample – sometimes even a single copy. (looked it up on google lol)

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Compare and contrast at least two different ways human activity affects the ecosystem both positively and negatively
kozerog [31]

Answer:

Got dis

Explanation:

When humans mass produce items for others to buy, those factories that make that stuff release carbon dioxide into the atmosphere which kills the ozone layer (the ozone layer basically protects everything on this planet from the suns dangerous UV rays). On the other hand humans try to help out the environment for example those cars that people use that use electricity and not fossil fuels as energy for the car and the fossil fuels have the same affect as the factories but the electricity does not release the fumes that the fossil fuel cars do. Hope this answers your question!

8 0
3 years ago
Can someone help with the labels for this ?
JulsSmile [24]

Answer:

Refer to the attached image for correct labeling.

Explanation:

  • The diagram is of a plant cell and its organelles.
  • The nucleus houses the genetic material and controls all life processes.
  • A plant cell contains one large vacuole in the center that stores water and nutrients.
  • Chloroplast is the site for photosynthesis. It captures light and utilizes it and carbondioxide to produce glucose.
  • Mitochondria are called the power house of the cell. Through a process called cellular respiration, they break down the glucose produced in photosynthesis into energy compounds such as ATP as well as oxygen and water.
  • The endoplasmic reticulum is the site for protein sysnthesis. It contains two parts: the rough endoplasmic reticulum (RER) which contains ribosomes that synthesize proteins and the smooth endoplasmic reticulum (SER) which packages the proteins into transport vesicles.
  • The nucleus contains the nucleolus that is the site for ribosome assembly.
  • The cell membrane is a semi-permeable membrane that covers the cell and controls cellular transport.
  • The cell wall is a hard, outer covering that protects the cell and maintains its structure and shape.

6 0
3 years ago
Describe three types of relationships between organisms found within an ecosystem. How is energy transferred in each type of rel
maks197457 [2]
Well, there's producers and consumers. There is also one provider that is the main source of energy for all living things which is the sun. The sun provides sunlight for the producers to make their own food through photosynthesis then consumers come and eat the producers(plants) and that gives them energy. And then predators come and eat that animal and that provides their energy.
4 0
3 years ago
The only way to tell if the red blood cells are crenated is to
Montano1993 [528]

Answer:

is to go for medical check-up

Explanation:

it's through the medical checkup

you will know that it still crenated

8 0
3 years ago
You believe a victim may have a closed abdominal injury. what is the next care step you should take?
Yuki888 [10]
If you suspect that a victim has closed abdominal injury, the best thing to do is to carefully position the victim on his or her back and loose any tight fitting clothing that the person may have on. 
Positioning this victim like this will prevent the risk of causing further injury.
5 0
3 years ago
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