What percentage of fish species live in freshwater ecosystems? a. 30% b. 40% c. 45% d. 35%

Which kingdom includes some organisms that have no nucleus and can live in an environment with an extremely high salt content

The spermists believed that: the male made the only hereditary contribution to the offspring the male and female traits were blended in the offspring the female made the only hereditary contribution to the offspring the male and the female made equal contributions to the next generation

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