I think it's so your lungs can expand to help you breathe properly ? You may have to wait for some more answers to come through
Answer: selective breeding which means whenever a farmer picks out certain traits for an animal for it's specific environment or skills dey will need to live dere.
Explanation:
The answer is microscopic life appeared on Earth before flowering plants. This is because according to the label on the second box, microscopic life appeared 4.0 to 3.5 billion years ago, and this is way before the date 250 to 120 millions years ago indicated on the label on the sixth box the flowering plants appeared on Earth.
Plant Roots. The root system of a plant constantly provides the stems and leaves with water and dissolved minerals. In order to accomplish this the roots must grow into new regions of the soil. The growth and metabolism of the plant root system is supported by the process of photosynthesis occurring in the leaves.
