Close relatives of animals can become multicellular if distinct individuals join together or if dividing cells remain attached. A species has been found to use both mechanisms.
Watch: Moment Jim Lovell told earth "Houston, we've had a problem" as Apollo 13 suffered a fault
，更多细节参见91视频
Copyright © 1997-2026 by www.people.com.cn all rights reserved，详情可参考51吃瓜
item.published,