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Westkost [7]
3 years ago
15

HELP PLEASE

Biology
1 answer:
Lesechka [4]3 years ago
4 0
D because to help preserve environment everyone has to work together
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The immune systems line of defense ______ includes the two types of immune response?
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The immune system responds to antigens by producing cells that directly attack the pathogen, or by producing special proteins called antibodies.

Explanation:

Specific immune responses are triggered by antigens. Antigens are usually found on the surface of pathogens and are unique to that particular pathogen. The immune system responds to antigens by producing cells that directly attack the pathogen, or by producing special proteins called antibodies.

The immune system review (article) | Khan Academy

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What tools can be used to make observations of the color of a mineral
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You can identify a mineral by its appearance and other properties. The color and luster describe the appearance of a mineral, and streak describes the color of the powdered mineral. Each mineral has a characteristic density.

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:)

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A biologist treats a cell with a certain chemical that inhibit the cell ability to synthesise DNA
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If the cell treated with a chemical that inhibits DNA synthesis is treated to undergo the process of the cell cycle, the phase that will be affected is the S-phase of interphase.

<h3>What is interphase?</h3>

The interphase stage of cell division is the resting stage between two successive divisions.

The interphase is further grouped into three phases namely:

  • G1 phase
  • S-phase or synthesis phase
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The synthesis phase of interphase is the stage where new DNA strand is synthesized, hence, if the cell treated with a chemical that inhibits DNA synthesis is treated to undergo the process of the cell cycle, the phase that will be affected is the S-phase of interphase.

Learn more about interphase at: brainly.com/question/17485110

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