Which of the following is mis-matched?
a. astrocytes - blood-brain barrier
b. ependymal cells - choroid plexus
c. ependymal cells - produce cerebrospinal fluid
d. oligodendrocytes - form myelin sheaths
e. microglia - provide support for the neuron cell body

What are charcteristics of lithosphere?

World class speed skaters can skate a 3,000-m course in about 4 minutes. what is their average speed for this course. a. 12.5m/s b. 1.33m/s c. 13.3m/s d. 1.25m/s

How is anaerobic respiration affected by changes in temperature? (5 points)based on the conditions of early earth, what conclusion can you draw about the amount of anaerobic respiration that was occurring at earth’s beginning? explain your answer.(5 points)if there was a sudden drop in temperature after the evolution of the first living cells, predict how that might have affected the changes in the atmosphere and the evolution of cyanobacteria and other autotrophs. explain your answer. (5 points)