1. A(n) is an example of an animal that is a chordate but not a vertebrate. 2. One of the features shared by all chordates is a(n) , a flexible rod that runs along the top side of the back. 3. All vertebrates have a(n) , an internal system of bones (in your case, 206 bones). 4. A(n) is an animal that has a backbone in addition to displaying the four features of all chordates. 5. A(n) is an animal that lacks a backbone and may or may not have all of the chordate features. 6. The phylum contains animals that share four specific anatomical features, including a hollow nerve cord and a tail.

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs

condensation. good luck!

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.