If 90 g of 45C water is added to 20 g of 90C, what will the final temperature be? C Round your answer to the nearest WHOLE number temperature.

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?