A bird watcher sees an unusual bird at a feeder. He takes careful notes on the bird's color, shape and
other physical features, and then goes to a reference
book to see if he can identify the species. What aspect
of scientific thinking is MOST apparent in this
situation?

In the family tree below, people with the recessive trait of attached earlobes are shaded gray.

The hypothesis of continental drift states that earth's continents, which are located on tectonic plates, move relative to each other. which of the following is true of the movement of the tectonic plates? a. tectonic plates only move once every million years. b. they move at a rate of approximately 5 centimeters per year. c. tectonic plates never move, only the continents located on them do. d. their movements are very rapid and occur at random times.

The influenza virus cause the flu, but not other diseases. why?