What is the minimum hydrogen to helium ratio observered?

1: 1
2: 1
3: 1
4: 1

How are gene and protein sequences used to classify organisms?

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

How are agricultural practices used today