Please help me with this east question asap What are the features of Class Demospongiae?
A. small and dull in color with a skeleton make of calcium
carbonate
B. can be up to 6 ft. in length and used as natural bath sponges
C. "glass sponges" made from silica

Please only respond if you know the answer

uh two lol

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explanation:

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blue stars have the highest surface temp

stellar distances are usually expressed in light-years

the measure of a star's brightness is called magnitude

hope this !

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".