The answer is b I just took that test
- Blood Cell
- Heart Muscle Tissue
- Heart
- Circulatory System
- Fish
A cell is the smallest functioning unit of an organism, so it's the least complex of all. Followed by tissue, the organ (heart), the circulatory system and the organism, which is the fish.
Cyclin-depedant kinases (Cdks).
Answer:
Photosynthesis removes carbon dioxide naturally — and trees are especially good at storing carbon removed from the atmosphere by photosynthesis.
Explanation:
This is full explanation :)