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tensa zangetsu [6.8K]
3 years ago
13

The specific defenses of the immune system include a variety of cells that circulate in the blood and that make up organs such a

s the spleen and thymus. How are the cells of the immune system able to differentiate pathogens from the cells of the body?
A. The cells of pathogens are much smaller than human body cells.
B. Pathogens move through the body, while human body cells are stationary.
C. Pathogens contain foreign molecules, or antigens, on their outer surface.
D. Pathogens release foreign molecules, or antigens, when cells of the immune system approach them.

Biology
1 answer:
Llana [10]3 years ago
8 0

Answer:

C. Pathogens contain foreign molecules, or antigens, on their outer surface.

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Answer: Ecosystem

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An animal cell with a 30% salt solution is placed in a beaker with a 20% salt
AleksAgata [21]

Answer:

the animal cell will burst

Explanation:

If the salt solution in the animal cell is 30%, it means the water is at a 70% concentration. Outside is 20%, so the water is 80%.

Water will enter the cell. Water is at a higher concentration outside the cell (80%) or a lower concentration inside the cell (70%) by the process of osmosis.

Eventually, the animal cell will burst, because it does not have any cell wall to control the swelling of the cell that occurs as water flows in.

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3 years ago
1) What happens to the force between two object, if
Zigmanuir [339]

Answer:

<h3>Heyy mate!</h3>

Explanation:

  1. (i) The gravitational force between two objects is directly proportional to the product of masses of the two objects. So, if the mass of one of the objects is doubled, then the force also gets doubled (it becomes 2 times).
  2. If the mass of one of the objects is doubled, then the force of gravity between them is doubled. ... Since gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces.
  3. The distance between the objects is doubled and tripled
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  5. Since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. ... If the mass of both of the objects is doubled, then the force of gravity between them is quadrupled; and so on.
<h2>pls mark me as brainliest!!</h2>
7 0
2 years ago
Hunting is a form of artificial selection. Defend or refute this statement based on the principles of artificial selection
shtirl [24]

Hunting IS NOT a form of artificial selection because it is not a form of breeding. Artificial selection refers to the intentional breeding of plants or animals. An example would be a thoroughbred racehorses, because they were selectively bred.

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3 years ago
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Hi please answer the following questions
Arlecino [84]

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It's used in thermometers because it has high coefficient of expansion.

conifers,mushrooms

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HERE YOU GO HOPE IT WILL HELP YOU

8 0
3 years ago
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