To ecosystems thrive, humans must gain a better understanding of

In iceland, the mid atlantic ridge runs through the center of the contry. what can you conclude about the apperence of iceland many thousands of years from now?

What type of appendages do sponges cnidarians roundworms annelids mollusks arthropods echinoderms and vertebrate have? jointed, not jointed, absent  

The term life cycle includes the entire process of: adults defending their young providing a conducive environment adults producing gametes fertilization the growth of the offspring to adulthood