Blood is forced through blood vessels in the human body. Friction, the opposing force, between the blood and vessel walls counters the motion of the blood through the vessels. These forces are forces.
A.
equal
B.
unequal
C.
balanced
D.
unbalanced

The fauces connects which of th following structures to the oropharynx

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.

What is a photon? a. part of a ribosome b. a light particle c. a carbon dioxide molecule d. part of a chloroplast b.a light particle