Which statement is not true of cilia in the respiratory tract?
a. they clean the respiratory system.
b. they are thin structures that resemble hairs.
c. they close the windpipe opening when swallowing.
d. they move mucus from the bronchi to the pharynx.

The rapid decomposition of organic matter produces evidence which supports: the slow accumulation of coal deposits long ages of the earth rapid burial of vast amounts of vegetation biblical account of noah's flood

Which enzymes break down carbohydrates?

Ihave no idea how to solve these. plus there's another question that is 2) a 10 kilogram meteorite is collected in space and brought back to earth. it is composed of 1.25 kg of uranium-238 and 8.75 kg of lead-206. how many u-238 half lives have passed? what is the approximate age of the meteorite?