It will be 1 and 2.
This is not biology. This is Science.
When was BSE first discovered?
BSE first appeared in British cattle in the mid-1980s. There have been numerous cases detected in other countries. A complete list of countries is available from both the U.S. Food and Drug Administration (FDA) and the U.S. Department of Agriculture (USDA).
Light waves or gravitational waves sorry if not correct
They are called
a. sunspots
I think it is B because a cladogram shows how species are related AND also shows the evolution between them.
