What components are inside of this boundary that likely pick up the oxygen as it comes in and move it to the rest of the organs in the salamander? List them and describe what they do.

What are two reasons for why a species might disappear from the fossil record?

How many copies of each chromosomes should be present in each of the 4 final haploid versions of gamete?

My question says on my assignment. read the following scenarios and decide which of the properties of life are being described. the first one is. katherine stopped on the way to school to grab some donuts. 2. because a dog cannot sweat, it has to pant in order to stay cool. 3. an elephant trun had no bone but 4,000 muscles. i have no idea what i am supposed to anwer. i can't find the answer in my notes or book that i can understand anyway