Cellular respiration converts the reactants' oxygen and glucose into carbon dioxide, water, and energy. the reverse reaction of photosynthesis converts reactants of carbon dioxide and water into oxygen and glucose. these two reactions are part of which biochemical cycle? a) carbon cycleb) water cyclec) phosphorus cycled) nitrogen cycle

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

Select the correct answer. tay-sachs disease is caused by a mutation in the hexa gene located on chromosome 15. tay-sachs follows an autosomal recessive pattern of inheritance. with the of the diagram, identify which of the offspring will be an unaffected carrier. a diagram showing the genes of parents who are carriers of tay-sachs disease a. a, b, and c b. b and c c. a and d d. a e. d

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.