When you inhale oxygen comes in then goes though trachea then lungs and into aveoli Then the blood carry oxygen to our body cells to remove carbon dioxide
Answer:
Steam.
The burning coal warms water in a boiler, resulting in the production of steam. Steam from the boiler rotates the turbine engine's blades, converting thermal energy from the burning coal into mechanical energy that powers the turbine engine.
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Answer:
Angiosperms have seeds with an 3n endosperm due to double fertilization.
Explanation:
- Double fertilization is found only in flowering plants.
- In angiosperms, the female gametophyte does not grow after reaching eight nucleate stage.
- After fertilization and triple fusion, the zygote and primary endosperm are created and further growth of embryo sac continues.
- Triple fusion is the fusion of two haploid polar nuclei of female gametophyte and one male nuclei. This results in a 3n nucleus.
- The developing embryo obtains nutrition from the endosperm.
- If fertilization fails no endosperm is formed.
