Please help me I’m timed

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

Can a trait be both polygenic and have multiple alleles? explain why or why not.

What if the yeast were extremely active and produced more than 100ml gas. would you know? why/why not