Answer: c
Explanation: because it helps by excreting
Answer:
B. more soldies who had lost a limb returned home
Answer:
A. Cluster of cells surrounding a developing egg in the uterus
Explanation:
Answer:
When organisms use organic matter for cellular respiration, ALL the matter goes back into carbon dioxide, water, and minerals, while ALL the energy leaves the ecosystem as heat (which is ultimately radiated out into space). So matter cycles, energy flows through ecosystems.