It's acclimation. Adaption is more about changing physically to adjust to the habitat, but the bears eat during the summer and then hibernate so they can adjust to the climate's temperature in order to maintain performance in the environment
<span>b. humans</span>
Sponges and invertebrates dominated the seas during the Paleozoic Era. This era is said to have ran about 542 million to 251 million years ago. This was the time when the supercontinent broke and formed new continents. This era is most famous for the "Cambrian Explosion" where life exploded on Earth that started the evolution of arthropods and chordates. <span>
Life mostly flourished in the seas during the Paleozoic Era. This was proven by invertebrate-fossil records found. The most famous was the armored arthropod known as the trilobite. This organism scuttled around the seafloor about 270 million years ago.</span>
Answer:
If for example food becomes scares for a group of birds they must now eat something else. these birds have two different beaks on large for the food currently going becoming spars and the other just small enough for them to eat the smaller nuts and survive. The birds who can not eat the small nuts will die and then the small beaked birds will become more abundant.
Explanation:
