When considering organelles that have arisen by endosymbiosis which one of the following is unique to chloroplasts? Produce energy for use by the rest of the cell. Have 3 distinct lipid bilayers. O Are approximately the same size as a prokaryote. Are purple following a Gram stain. Free ribosomes are found in the matrix

What are the toxic gases? How does gaseous effect on health at workplace, explain any four of the gaseous pollutants.

Q. 2. Give a brief notes on following Physical hazards at work place.

A. Light      B. Noise       C. Vibration

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