Answer:
White blood cells defend against pathogens in three ways. Firstly they release anti-toxins, which neutralize the effect of toxins produced by bacteria. The second way they destroy pathogens is by engulfing/ingesting them.
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Answer: A disease that is not contagious is called a noninfectious disease. These diseases are not caused by pathogens. Instead, they are likely to have causes such as lifestyle factors, environmental toxins, or gene mutations. Common types of noninfectious diseases include cancer, diabetes, and immune system diseases.
Explanation: hope this helps :)
Answer:
(a) and (d) are correct
Explanation:
AIDS is a disease that's usually transmitted by sexual contact and breast feeding.
Answer:
the grass is the producer, the snake is the secondary consumer, and the eagle (i think thats what the bird is) is the tertiary consumer
Explanation:
the grass is being produced so that one is obvious
the snake is the secondary consumer because it eats the bunny and the bunny consumes the grass. So the secondary has to be the snake
the eagle is the tertiary consumer because it eats the snake and like i stated before the bunny consumes the grass, then the bunny gets consumed by the snake, but the the snake gets consumed by the eagle.
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