Why did early naturalists think that sponges were plants and not animals?

Early naturalists regarded sponges as plants due to their lack of obvious movement as well as there distinctive branching form. Sponges do not have any organs and their skeleton is fibrous. It wasn't until 1755 and later confirmed by observation in 1765, that changes in the diameter the openings to their central cavity were described, thus proving the animal nature of sponges.

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.