Fungi cell walls are O made of cellulose, like plants
O made of polÿsaccharides and chitin
O permeable
semipermeable

Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%

About how many years does it take for one cycle of surface water to become deep water and then surface water again in the oceans? 101001,000

Modern sea star larvae resemble some primitive vertebrate larvae. this similarity may suggest that primitive vertebrates