Answer:
the immune system needs B cells and memory B cells form into memory cells so that remember the same pathogen and the antibody used to take it down for faster antibody production in future infections when most of the same antigens infect the body again.
Explanation:
When the body senses foreign substances like antigens, the immune system works to recognize the antigens and get rid of them. B Cells that have a certain antibody codes/proteins for the specific antigen are triggered or activated by T cells to make the specific antibodies, or immunoglobulins, to use against the antigens, by locking onto the antigen and putting the antibodies into the antigen directly.
Liquid: D
Gas: B
Solid: C
Plasma: A
Hopefully these are correct.
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Answer:
Hypothesized causes for the declines include habitat destruction (the most obvious cause), climate change, pathogens, introduced exotic species, pollution, and increased UV radiation. These agents may act alone or in combination to contribute to the decline of amphibian populations.
Explanation:
I think this is the answer
Hope it helps you
A prey is an animal that is being eaten by a predator.
- If prey population decreases in number, the predator population will also decrease because there is not enough food for predators to survive.
- If predator population decreases, the prey population will increase because less prey will be eaten by predators.
- If prey population increases, the predator population could also increase because there will be a lot of food for them.
- If predator population increases, the prey population must decrease because more predators will eat more prey.
