The carbon cycle is the biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth. Carbon is the main component of biological compounds as well as a major component of many minerals such as limestone hope this helps you pls thank me
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Answer:
they have certain functions and or adaptations that allow them to move without spines
Explanation:
The correct answer is B. Thymus gland: enables immature lymphocytes to mature into T cells
photosynthesis
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