Complete the following statements. 1. indicates that a produced sound is being reflected back.
2.Noise is produced by vibrations.
3.The source of the sound and the is very important in order to produce the sound.
4.The height of amplitude affects the of the sound.
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How is the male reproductive system different from other body systems? it isn’t necessary to vital signs. it monitors other body systems, and adjusts if necessary. it transports items from one system to another. it is the only system that produces hormones in the male.

What are the formed elements (cell or parts of cell) in blood and what are their functions ?

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.