Match each organism with the type of association it exhibits. barnacles on the back of a whale
a stork eating a fish with its beak
ticks sucking the blood from the body of an animal

prey-predator=
parasitism=
commensalism=

Prey-predator = a stork eating a fish with its beak.

Parasitism = ticks sucking the blood from the body of an animal.

Commensalism = barnacles on the back of a whale.

Explanation:

The stork is a predator since it feeds on another organism completely (the prey). The ticks are parasites as they feed off nutrients from a living animal. The barnacles and the whale are commensals as the barnacles are carried about at no harm to the whale.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

hope this : )