Answer:
Our immune system produces antibodies against that antigen of pathogen.
Explanation:
Injecting an antigen from a pathogen would help our immune system memorize the infection and protect our body from causing of the disease because our immune system produces antibodies against that antigen so when the pathogen enters our body these antibodies attack on that and prevent them of causing infection in the body so that's why injecting an antigen has to be done from the childhood to prevent diseases.
D is DNA
B is cell membrane
C is ribosomes
A is cytoplasm
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Answer:
Plants have a <u>cell wall</u> which gives the plant structure. The cell wall is made of cellulose.
Explanation:
Answer:
nervous system
Explanation:
The nervous system is also a fight-flight system...meaning the reflexes are in work to either fight or fly away.Hope it helps:)
Answer:
High mass stars have to generate a lot of energy in order to balance the force of gravity. Therefore they are very hot and luminous. That explains their position high on the Main Sequence. On the other hand, low mass stars have to generate little energy in order to balance the force due to gravity.
