BIOLOGY MIDDLE SCHOOL

explain the relationship between cells, tissues, organs, and organ systems in one complete paragraph please

Answers

Answer 1
Answer: Many cells working together forms a tissue.  Many tissues working together forms organs. Many organs working together forms organ systems.  So it goes from general to most specific.  Organ systems are needed in order for life.  This proves that cells are the most basic units of life.
Answer 2
Answer: Organ system is made up of organs. Organs are made up of tissues. Tissues are made up of cells. Just like first comes world. Then, continent and so on...

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Which describes interactions between substances and stomata during photosynthesis? Choose all that apply.Oxygen enters stomata.
Oxygen is released through stomata.
Carbon dioxide enters stomata.
Carbon dioxide is released through stomata.
Hydrogen enters stomata.
Hydrogen is released through stomata.

Answers

Answer:

It's only oxygen is released through stomata and carbon dioxide enters the stomats

Explanation:

I took the test ✌

Answer:

Its B and C

Explanation:

Which statement describes gravity? Check all that applyThere is no defined unit of measurement for gravity
Gravity is the force that pulls objects toward Earth's center
Objects that have a small mass will have no gravitational pull
Gravitational pull between two objects increases as the mass of one increases
Gravitational puli decreases when the distance between two objects increases

Answers

Answer:

gravity is the force that pulls objects towards earths center

Pleaseeee I need help

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Answer: good luck that looks hard

Explanation:
Scientists have found geologic evidence that shows an asteroid roughly 10-14
kilometers in diameter--the size of a small city-hit Earth about 66 million years ago. The impact created a huge explosion and a crater about 180 kilometers in diameter.

6. 

Tommy and John are trying to move a large table.  John pushes with a force of 1150N and Tommyhelps him by pushing on the same side of the table with a force of 800N.  Sketch the individual forces exerted on thetable and then calculate and show the net force exerted on the table.

Answers

Answer:

Net force = 1150 + 800 = 1950 N

Explanation:

The diagram above illustrate the force applied to the large table by Tommy and John.  The force are exerted in the same direction . The first arrow represent the force applied by John which was 1150 Newton and the second arrow represent the force exerted by Tommy which was 800 newton.  There was no opposing force indicated like gravity from the question so no need to sketch that.

The forces were applied in the same direction, therefore, the Net force can be computed by adding their individual forces .

Net force = 1150 + 800 = 1950 N
First draw a table of sorts. Draw 2 arrows pointing in the same direction towards the table, labeling one as 1150N and one as 800N. Now, since both forces are exerted in the same direction, we can add the forces. So, 1150N + 800N, which is 1950N. There’s no weight and it doesn’t look like gravity is involved. If gravity is involved, just draw an arrow pointed down at the middle of the table, and a normal force pointed up towards the middle of the table. Hope this helps

the last name of the scientist (Newton, Pasteur, or Dalton) next to his discovery. Disease-causing bacteriaa0

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pasteur. invented the pasteurisation process used on milk

Devise a serial dilution scheme to prepare 1/20, 1/40, and 1/80 dilutions of a disinfectant

Answers

Answer:

The serial dilution can be done by half- logarithmic dilution method.

Explanation:

  • This is also called the Ten-fold dilution method.
  • The process involves the following steps, and the volumes represented are arbitrary.
  1. From the concentrated solution of the disinfectant take 1 ml of disinfectant in a falcon tube. 9 ml of water is added to that. Here we get a solution which is  (1)/(10) diluted.
  2. Take 1 ml of the above (1)/(10) diluted solution in another falcon and add 9 ml of water to it. Here we will get a solution which is  (1)/(20) diluted.
  3. Take 1 ml of the above (1)/(20) diluted solution in another falcon and add 9 ml of water to it. Here we will get a solution which is  (1)/(40) diluted.
  4. Take 1 ml of the above (1)/(40) diluted solution in another falcon and add 9 ml of water to it. Here we will get a solution which is  (1)/(80) diluted.

Final answer:

To prepare a serial dilution, you start with the stock solution and dilute it step-by-step. For a 1/20 dilution, take 1 part solution and add 19 parts solvent. For a 1/40 dilution, dilute the 1/20 solution further by taking 1 part of the 1/20 dilution and adding 1 part solvent. Similarly, for a 1/80 dilution, take 1 part of the 1/40 dilution and add 1 part solvent.

Explanation:

To prepare a serial dilution, you start out with a stock solution (in this case, the disinfectant) and dilute it step by step. To prepare the 1/20 dilution, you take 1 part stock solution and add 19 parts solvent. Then for a 1/40 dilution, you can dilute the 1/20 solution by a further factor of 2: take 1 part of the 1/20 dilution and add 1 part solvent. The same principle applies for the 1/80 dilution: take 1 part of the 1/40 dilution and add 1 part solvent, or you could take 1 part of the original stock solution to 79 parts of solvent.

Learn more about Serial Dilution here:

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