The solid inner core is made of mainly iron crystals with small amounts of nickel and heavier elements such as gold and platinum. The liquid outer core is a nickel iron alloy with small amounts of heavier elements.
<span>This is the acquisition stage. During this stage, the learned behavior is being taught and the learner begins to link the stimulus with the response. After a time, the behavior does not need to be linked to the stimulus (the shock) for it to take place and it can automatically occur whenever the light is presented.</span>
Answer:
Parasitists have to the body's immune system to establish parasitism, in addition to having to deal with the damage it does to the host organism.
Explanation:
Parasites are organisms that associate with living beings in an unequal relationship, where the parasite uses the vital resources of living beings for their survival, generating problems for the host organism.
As biotic environments where parasites can grow, we can mention plants and animals. For parasitism to be established, the parasite must face the immune defense system of these organisms, in addition to having to face the evils that are caused by parasitism, since the parasite needs the host to be alive for it to survive.