Molecular composition a) high lead levels in a lake kill fish flammability b) gasoline catches fire heat of combustion c) water has two hydrogen atoms and one oxygen atom toxicity d) the burning of coal releases heat

Which of these is not an example of molecular homology? 1. use of dna and rna as genetic material 2.use of glycolysis as the first step in cellular respiration in both plants and animals 3. the lack of an igf-1 gene in prokaryotes 4. the use of aldolase b to break down fructose in bacteria, plants and animals

According to the article, what valid claim came from the national research council? there is no association between fluoride exposure and increased cancer risk in humans. there is a possible link between fluoride exposure and increased cancer risk in humans. there is a definite link between fluoride exposure and increased cancer risk in humans.

If this person had son, what, sex chromosome did they give their son? a. x b. y c. neither d. we need more information to know for sure