How to speak perfect japanese​

Which of the following is caused by reproductive isolation within a species? a. a decrease in gene flow b. an increase in genetic flow c. a decrease in genetic drift d. an increase in gene flow

The most famous fossil called archaeopteryx is which of the following? a dinosaur a fern a fish a bird

Hairs that clean dirt out of the air in your nasal passages are called: a. sinus b. trachea c. cilia d. mucus