Answer:
Explanation:
You have external defense systems, which include your skin, tears, mucus, saliva, stomach acid, cilia (small hairs) and helpful bacteria. ... The skin stops pathogens from entering the blood, at least when you're not bleeding. The tears, mucus, and cilia trap them and help push them back out of your body.
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Answer:
A system is a group of interacting or interrelated entities that form a unified whole. A system, surrounded and influenced by its environment, is described by its boundaries, structure and purpose and expressed in its functioning. Systems are the subjects of study of systems theory.
Explanation:
Answer: El Niño is a part of a routine climate pattern that occurs when sea surface temperatures in the tropical Pacific Ocean rise to above-normal levels for an extended period of time.
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Answer: The article is a emotionally charged tone ( argumentative tone). A argumentative article is based on a persons opinion and is driven by their thoughts. this is shown through when the author wrote, "NASA’s space program is worth preserving at any cost." This shows that the author personally believes that the space station needs to be preserved, therefore their tone is argumentative since they are trying to prove their opinion to be right. This is also presented when the author stated "All of these activities offer hope to our increasingly overcrowded planet." and "It is impossible to list all the benefits of a thriving space program." All of these examples show that the author has taken a strong opinion on the matter. This therefore makes their town argumentive and emotionally based.