Answer:
Mitochondria and chloroplasts likely evolved from engulfed bacteria that once lived as independent organisms. At some point, a eukaryotic cell engulfed an aerobic bacterium, which then formed an endosymbiotic relationship with the host eukaryote, gradually developing into a mitochondrion. (nature.com)
Explanation:
Answer: pollen
Explanation: The anthers bear the pollen grains which contains the male gamete(sperm).
The blood becomes oxidized, and maintains the level of oxygen in to the level of oxygen out, which is homeostasis.
Answer:
Plants loose their leaves in winter due to following reasons: The plants of these types are called deciduous plants. The leaves of these plants contain a chemical called Chlorophyll. Chlorophyll in the presence of sunlight make food for plant and the process is called photosynthesis.
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