What is not true about extinction? A. It is the end of existence of a species or group of related organisms
B. It is the end of existence of many species or group of unrelated organisms
C. Extinction occurs when the organism is no longer able to survive in changing conditions
D. About 99% of all species have become extinct

scientists have discovered that hiv does not cause aids by the virus's direct effect on the host's immune cells, but rather through the cells' lethal influence on one another. researchers from the gladstone institutes have revealed that hiv does not cause aids by the virus's

sorry, is there a picture? i do not see any arrows.

wut? unius0123 wut?

straight probes are used primarily for measuring flow as it is approaching the test area. its geometry allows the probe to be mounted so that it is in the direct line of airflow.