A cell is a complex system. Like most systems, a cell contains a boundary that separates things that are inside the system from those that are outside of the system. Which part of the cell functions as a system boundary

Answers

Answer 1

Answer: The cell membrane of the cell works as a system boundary. It controls what can enter of leave the cell.

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Which type of circulation explains the movement of blood from the heart to the lungs and back to the heart again?

Answers

Pulmonary circulation is the type of circulation that explains the movement of blood from the heart to the lungs and back to the heart again.

Blood that does not carry oxygen originates from the heart and moves to the lungs where it is filled with oxygen. Oxygen filled blood from the lungs travels back to the heart where the oxygen is used up.

As your heart beats, it brings up blood through a system of blood vessels called the blood circulatory system, the vessels that are in your body are elastic tubes that carry blood to every part in your body. oh and the type of circulation is Arterial and these blood vessels carry blood away from your heart through the elastic tubes. The Arterial blood vessels helps the blood circulate through your body with an constant flow.....

The kidneys keep your body from losing too much water, sugar, or salt.

TrueFalse

Answers

The answer to that is true :)

Answer:

True

Explanation:

hope this helped someone who needed it!

When light energy excites electrons in photosystem II, where do the electrons to replace them come from?

Answers

the electrons are already there in photosystem II, they are just in a cloud that is around the positive nucleus!

How do conservation tillage practices lead to agricultural sustainability?

Answers

The conservation of tillage practices leads to agricultural sustainability by protecting the farmer's crops from insects and other pests, thus, it reduces the need for the farmers to buy pesticides for the crops, since the tillage method prevents insects.

What are bacteria called that require a constant supply of oxygen in order to survive?Obligate aerobes
Obligate anareobes
Facultative aerobes

Answers

bacteria that require a constant supply of oxygen in order to survive are called
Obligate aerobes
because these need oxygen to grow and for their all necessary processes
The option B cannot be correct because they dont need oxygen while C are those that can also live without oxygen
so option A is correct
hope it helps

Answer:

The answer is Obligate aerobes.

Explanation:

Hope this helped ya.

< Sarah >

What is the difference between meiosis i and meiosis ii.

Answers

Explanation:

Meiosis I has one diploid parent cell and ends with two haploid daughter cells, splitting the number of chromosomes in each cell. Meiosis II starts with two haploid parent cells and ends with four haploid daughter cells, maintaining the number of chromosomes in each cell.

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What part of the body has lots and lots of human cells, where we can easily access these cells and extract DNA?

Differentiation switches certain genes on and off to create specialized cells. true false