Biological soil crusts<span> are communities of living organisms on the </span>soil<span> surface in arid and semi-arid ecosystems. They are found throughout the world with varying species composition and cover depending on topography, </span>soil<span> characteristics, climate, plant community, microhabitats, and disturbance regimes.</span>
Answer: I'll help
Explanation:
21. Wood
22. 1885
23. 1890
24. 1945
These are rough estimates because it's a little difficult to interpret the graph but this should be close enough hopefully
The answer is D. Predation of insects resembling twigs of trees occurred.
Answer:
antibiotics
Explanation:
Only some antibiotics will stop protein synthesis.
Photosynthesis and cellular respiration are<u> chemical reactions</u> that occur in cells.
<h3>What is photosynthesis and cellular respiration?</h3>
Photosynthesis is the process of making food through carbon dioxide, water and sunlight. It is an anabolic reaction.
Cellular respiration is the process of breaking down of food molecules by oxygen. It is a catabolic reaction.
Thus, the correct option is a, chemical reaction
Learn more about cellular respiration
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