To what kingdoms do cnidarians belong?

An organism has the following traits multicellular cant photosynthesize has a skull. wht kingdom does this organism most likely belong too?

The is an estimate of the fewest number of organisms a population needs to avoid extinction. this measurement will most if the number of offspring each female in the population produces increases. if the population's this measurement will most likely increase. 1 population density, minimum viable population, carrying capacity 2 decrease, be unaffected, increase 3 death rate increase, dead rate decrease

Hemoglobin is a proton that carries oxygen around your body what is hemoglobin made from