What do the colors produced by fireworks indicate?

Pls! plant cells and animal cells were observed under a microscope. the characteristics of two cells are listed below. cell p: does not capture sunlight cell q: has cytoplasm but no chloroplast which statement about the two cells is correct? cell q also has a cell wall. cell q also has large vacuole. cell p also has a large vacuole. cell p also has a cell membrane.

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

What are several ways to reduce the effect of friction