Sponges do not have any brains.
Sponges are among the most primitive of all animals.
They are immobile, and live by filtering detritus from the water.
They have no brains or, for that matter, any neurons, organs or even tissues.
A sponge is not a fish although a sponge is considered a type of animal.
A sponge is actually an animal although a sponge in the ocean thrives and looks like a plant.
A sponge is a living thing.
Sponges are "sessile" animals (they don't move around) and they live by pumping large volumes of water through their bodies and filtering out tiny organisms and organic particles as food.
Sponges are animals and not plants because a sponge is, in essence, a multicellular organism with no organs or tissues, but with specialized cells, which distinguishes it from small multicellular protists.
Sponges are considered to be one of the simplest animals, primarily because their bodies are not organized in organ systems or even tissues.
Rather, sponges are made up of a grouping of cells that work together to contribute to meeting the daily needs of the sponge.
Sponges are simple creatures, yet they are expert filter feeders, straining tens of thousands of liters of water through their bodies every day to collect their food.
Their mastery of this complex behaviour is all the more remarkable because they have no brain, nor even a single neuron to their name.
Sponges are similar to other animals in that they are multicellular, heterotrophic, lack cell walls and produce sperm cells.
Unlike other animals, they lack true tissues and organs. Some of them are radially symmetrical, but most are asymmetrical.
Sponges and cnidarians were the first animals to evolve from a multicellular ancestor.
Name the phylum to which sponges belong.
From what do biologists hypothesize sponges evolved and why?
From the colonial choanoflagellates because sponges have cells that look similar to these protist cells.
Sponges, the members of the phylum Porifera, are a basal animal clade as a sister of the Diploblasts.
They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells.
Sponges can live for hundreds or even thousands of years.
"While not much is known about the lifespan of sponges, some massive species found in shallow waters are estimated to live for more than 2,300 years.
Sponges are mostly filter feeders and they eat detritus, plankton, viruses and bacteria.
They also absorb dissolved nutrients directly from the water through their pinacocyte cells; each cell is responsible for getting their own food!