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kozerog [31]
3 years ago
5

What are the 2 signs you will observe if a chemical change has occured?

Biology
1 answer:
nadya68 [22]3 years ago
6 0
Hello:)

Two signs you can observe are physical changes such as burnt paper to ashes, and you can see in what form it is in, such as liquid,gas or solid.

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Where would you expect to find the strongest wind?
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Answer:

b)

Explanation:

Are those that become tornadoes, reaching the speed of 480km/hour and measuring up to 1500 mts in diameter in the soil, travel more than 100 km away.

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The type of selection where traits in the middle range are favored is
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If the population returns to its pre-disturbance size, genetic variation is generally ____________ than in the original populati
Maurinko [17]
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3 years ago
Please and thank youuuuuu<br><br><br> sorry thats how it came
Marizza181 [45]

Answer:

40: 3

41: 1

Explanation:

40: When trying to achieve a better or sharper image on a microscope, the part of the microscope that needs to be adjusted is the "fine focus" which is responsible for better/sharper image by either moving the stage or the eyepiece. The fine focus is labelled C in the image.

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7 0
2 years ago
Why are pigments such as chlorophyll needed for photosynthesis
Vlad [161]

Answer:

The chlorophyll pigment have photosystem 680/ PS I which captures the sunlight. Then the pigments gets excited and photosynthesis starts. Without chlorophyll photosynthesis can't happen.

Explanation:

Photosynthesis occurs in the chlorophyll pigment of the plant. They have the capacity to trap light energy and convert its energy to form glucose and oxygen.  

The chlorophyll is a double layer membrane structure. In it two photosystems works i.e. photosystem I and photosystem II. In the photosystem I light is trapped.  

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The photon have more energy, and when it comes in contact with PS 680, the pigments get excited. Then they release high energy electrons which helps to form ATP, NADPH. Because it is a light dependent reaction.

Glucose and oxygen are formed in the stroma as it does not require light. It is a light independent reaction.

Therefore, chlorophyll is first require to capture photons coming from sun.

6 0
3 years ago
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