The is a colored muscle that constricts when you enter a dark room or feel disgust. iris cornea retina fovea

Average annual precipitation and are the two major features that define the biomes on earth.

What is the term for the two sets of chromatids formed in the parent cell a.haploid b.diploid c.gamete d.tetrad

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen