Rough ER is studded with ribosomes and the Smooth ER has a smooth surface ..
Answer:
short answer: The Earths atmosphere
Explanation:
The Earth's atmosphere protects us from the multitude of small debris, the size of grains of sand or pebbles, thousands of which pelt our planet every day. So the probability of a major collision is quite small
hope this helps:)
chloroplasts is an organelle that actually carry out the photosynthetic activity will be unable to function if placed in a dark environment.
