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mylen [45]
4 years ago
5

What would be the first step in using PCR to copy a gene?

Biology
1 answer:
erik [133]4 years ago
4 0
B. DNA is heated to separate strands
This is always the first step in a PCR reaction, the Heat acts as Helicase to unwind the double helix.
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WILL MARK BRAINLIEST match the word to the correct description
pickupchik [31]

Answer:

1. High pressure: Happens when air cools and it becomes denser...

2. Low pressure: Happens when warm air rises...

3. Cold front: Cold air mass is replacing a warm air mass...

4. Warm front: Warm air mass is replacing a cold air mass...

5. Sun: Is necessary for evaporation to take place.

6. Nimbus clouds: Dark clouds that have rain or snow falling.

7. Cumulus clouds: Fluffy, dense clouds most composed of droplets.

8. Atmosphere: The layer of gases that surround the Earth.

9. Nitrogen: Makes up 78% of Earth's atmosphere.

10. Troposphere: Lowest layer of Earth's atmosphere. Where we live. Where we find most weather.

-Hope this helps.

7 0
3 years ago
Read 2 more answers
What is the human female reproductive system is adapted for? A. Production of zygotes in ovaries B. External fertilization of ga
victus00 [196]

Answer:

D. Transport of oxygen through a placenta to a fetus.

Explanation:

Zygotes are fertilized egg cell, zygotes aren't produced in the ovaries but ovums or egg cells are produced in the ovaries. So option A is false.

Fertilization is internal not external in human. Option B is wrong.

Production of milk happens in the mammary gland (the breast) not in the reproductive system. Option C is false.

Transport of oxygen through a placenta to a fetus. The placenta is a vascular organ which is implanted in the wall of the uterus (a part of the female reproductive system) and links to the foetus through the umbilical cord.

8 0
3 years ago
How old is Napolean??????????????????????????
aliina [53]

Answer:

He was 51 one years old before he died.

Explanation:

However, Napoleon II lived to only a mere 21 years.

3 0
4 years ago
Parasitism describes a relationship between two organisms where: *<br> 1 point
abruzzese [7]

Answer:

Parasitism describes a relationship between two organisms where one gets benefit and other get harm.

Explanation:

Parasitism is a type of symbiotic association that is present between two different organisms. In association, one organism gets benefit from the other and the other is damaged. For example, association between mosquitoes and human is parasitism because mosquitoes get benefit in the form of food while human is damaged due to disease cause by mosquito biting.

4 0
4 years ago
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According to evolutionary history and taxonomy, tigers resemble ____________ more closely than they resemble fish. A) hydra B) g
Kaylis [27]
I think its B hope it helps
6 0
4 years ago
Read 2 more answers
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