How can blood be stored much longer​

Whole blood can be stored at 4–8°C for up to 24 hours before the serum is separated, but it must not be frozen. Whole blood should be allowed to clot and then centrifuged at 1000 × gravitational units (g) for 10 minutes to separate the serum.

hope this helps

have a good day :)

Explanation:

compost can be added to topsoil as a:

pesticide