Answer:
Night or Day
Explanation:
when the earth is tilted towards the sun it is day and when it's titled away it is night
Carbon forms Covalent Bonds.
Explanation:
Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. Biotic factors include plants, animals, and other organisms. Abiotic factors include rocks, temperature, and humidity. Every factor in an ecosystem depends on every other factor, either directly or indirectly
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He developed and improved the microscope. He was also the first to discover single-cell organisms that he called animalcules.