An allergic response is not typically caused by a. harmless antigens b. pollen c. histamine d. both a and c i'm conflicted because histamine causes the physical response but pollen and harmless antigens cause histamine

Which of the following birds remained ancient looking in the miocene epoch? a. crows b. owls c. grouses d. none of the above

Are salt and soap nutrients or toxins for yeast? explain.

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.