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LenKa [72]
3 years ago
9

1. What's a stalactite?

Biology
1 answer:
Burka [1]3 years ago
5 0
<span>1. D dripstone produced by buildup of minerals precipitated from groundwater. Water drips down from, for example, the roof of a cave and slowly leaves behind mineral deposits which form a shape similar to an icicle
  2. D running water cuts small channels into a slope Rill erosion is formed by soil removal from small streams of running water. They form based on how the water falls down a slope and tend to migrate to already depressed or softer areas of soil.</span>
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Professional antigen-presenting cells, such as phagocytes, are the first cells to encounter a pathogen (apcs). This means they have the ability to activate cells of the adaptive immune system.

<h3>What is meant by Pathogen?</h3>
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Therefore the correct option is D)  can activate cells of the adaptive immune system.

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