Answer:
React on cell surfaces, catalyze reactions.
2 because the 1st energy level can only hold 2 electrons and the 2nd holds 4
Answer:
I am pretty sure.. it's option B.
COBALT.
Answer:
Hope this is helpful! Sorry if my answer is choppy.
Explanation:
Biotic and abiotic features are both important in ecosystems because for example, a biotic factor like a plant, relies on an abiotic factors like the rain and the sun. If the rain were non existent, then the plants would no longer be alive causing a chain reaction in the food system. Biotic factors like plants and animals that are non existent can also cause negative effects in biomes and ecosystems.
