Why might you be cautious of scientists information you hear from advertisers?

Name the plastid and pigment likely to be found in the cells of (a) petals of sunflower (b) ripe tomato.

What was the land like over 500 million years ago? what was under the sea?

15 ! come and answer! a(n) disease is caused by a pathogen and can spread among organisms. a infectious b noninfectious c toxic d contaminated