Answer:
Bipedal posture allowed arms to be free to develop and use tools.
Explanation:
Answer:
B
Explanation:
Autotrophs rely on the sun to produce energy through photosynthesis.
Answer:
1. Circulatory System
2. White Blood Cells
3. Capillaries
4. Vein
5. Carbon Dioxide (CO²)
6. Circulatory System
7. Immune System , Fights
8. Red Blood Cells
9. Gas Exchange
10. Transport
11. Lungs
12. Artery, Heart and Lungs
13. Heart
14. Important Plant
15. Alveoli
Photosynthesis produces oxygen, which we use to breathe.
Explanation:
a thermocline is an abrupt temperature gradient in a body of water such as a lake, marked by a layer above and below which the water is at different temperatures.
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