ASAP HELP PLSSS What makes cnidarians different from sponges?

A. Cnidarians have cells that are organized into tissues

B. Sponges are multicullular

C. Sponges are not mobile

D. Cnidarians are multicellular

Which potential solution below best addresses the issue of loss of biodiversity in a north american ecosystem?

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems

20 the compound al(nh3)2 has atoms of nitrogen.