Atruck is blowing its horn as it approaches a bystander at an intersection. according to the doppler effect, the bystander will notice that the sound- a. increases in pitch b. increases in wavelength c. decreases in frequency d. decreases in speed

Skulls of (1) modern gorilla, (2) australopithecus afarensis, (3) homo erectus, (4) homo neanderthalensis, (5) homo sapiens based on the diagram, which of the following best describes ways in which the physical appearance of h. neandertalensis and h. sapiens differ? (2 points)

The cluster of developing cells from conception until birth is called an

Which of these is true for bacteria because they are prokaryotic cells? a. they can engulf body cells in order to make memory cells. b. they must invade viruses in order to reproduce. c. they are much larger than eukaryotic body cells. d. they can reproduce on their own outside of other cells.