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Sophie [7]
4 years ago
13

The complement system is a ___ barrier of the immune system

Biology
2 answers:
m_a_m_a [10]4 years ago
8 0
Biochemical- apart of the second defense system
schepotkina [342]4 years ago
6 0

Answer:

biological

Explanation:

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Check and repair leaky plumbing regularly.

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Producers are organisms that do not need to eat other organisms to obtain energy. A. Which organism is a producer in this food c
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Dehydration Synthesis

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Which of the following fossil discoveries best demonstrates a change in the Earth's climate?
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Where is the long, pointed beak of a woodpecker most clearly an adaptation?
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