What is the difference between white and red blood cells?

a. red blood cells are in veins; white blood cells are in arteries.
b. red blood cells carry oxygen; white blood cells attack viruses.
c. red blood cells hold oxygen; white blood cells hold carbon dioxide.
d. red blood cells hold carbon dioxide; white blood cells hold oxygen.

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 8 options: the cold balloon expands and rises. the warm balloon shrinks and sinks. the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the warm balloon expands and rises. the cold balloon shrinks and sinks.

What is the main reason that attitudes are more often revealed in spoken rather than written language? a. in writing, we try to put the "best face" on what we write. b. we speak far more often than we write. c. in writing, we can more easily conceal our attitudes. d. in spoken language, we are often careless in our use of words.