Both the Cnidaria and the Porifera can be
considered to be “evolutionary dead ends”.
Discuss this statement
No other animals are believed to have evolved from sponges, thus they win the title of "an evolutionary dead end."
Sponges are placed in a separate taxonomic group, the Porifera, because they possess a simple cellular organization and lack true tissues and organs, distinguishing them from more complex animals. Their unique feeding and reproductive mechanisms, along with their asymmetrical body structures, indicate an ancient lineage that has not significantly evolved over time. Many zoologists consider them an evolutionary dead-end because they do not exhibit the advanced characteristics seen in other animal groups, limiting their evolutionary adaptability and diversification.
Hybrid animals are often considered evolutionary dead ends because they typically result from the mating of two different species, leading to offspring that may be sterile or possess reduced fitness. This means they cannot reproduce successfully and pass on their genes, limiting their ability to contribute to the gene pool. Additionally, hybrids may lack adaptations necessary for survival in their environments, making them less viable than their parent species. As such, they do not play a significant role in the evolutionary process.
Considered Dead was created on 1991-10-08.
There is no reason to think that the hummingbird is an evolutionary dead end. Granted, the hummingbird is an animal adapted to a unique niche, and a radical change in circumstances could mean the extinction of some of its species - but the same is true for many if not most lifeforms.
all biological enities are evolutionary experiments and will necessarily mutate but biological individuals are dead ends in the process.
If you have no parents, you are considered an orphan.
He was considered to be "as dead as a door nail"
It is considered impossible to communicate with dead. There is a passage in the Bible about King Saul having a conversation with the prophet Samuel after Samuel died, but, no religion communicates with the dead. Communication with the dead is considered beyond the capabilities of normal human beings. Spiritualism tries to communicate with the dead, but, that is considered a failure by most people.
A ball is considered dead when it goes out of bounds or is fumbled.
Yes. Even though your isn't pumping blood, and you are considered dead, you can still die. All you cells need to die too. Then, you will be considered fully dead.
You are said to be brain dead and are not vaible.