your inner fish
1. Why should we care about evolution? Why is it important?
Evolution is the building blocks to biological science. If we did not care about evolution, we would not understand the concept of biology, or any type of science for that matter.
2. What does it mean to be human? Did your concept change after reading the book?
After reading the book, I began to understand why my body looks the way it looks. I realized that we are all the same inside—from fish to monkeys, and even some reptiles. We all started from the same thing. In my opinion, being human can be summed up into a simple definition—a unique individual. Although we all developed from a similar place, being different makes us human. Each …show more content…
Zwilling and Saunders discovered that two tiny pieces of tissue controlled the development of the chick’s bone pattern inside the limbs. Removing those specific pieces of tissue changed how its arms developed.
2. Describe the hedgehog gene using several animal examples. Be sure to explain its’ function and its’ region of activity in the body.
The hedgehog gene was initially found in fruit flies. It was a gene that made each region of the body unique. Biologists examined other animals for the hedgehog gene. They found it in chickens and called it the Sonic hedgehog gene. The hedgehog gene is found in every creature with limbs. It is necessary to have this gene to form proper arms and wrists. Scientists have also found the hedgehog gene in mice and fish. They discovered that using the gene found in mice on a fish would create different shapes of skeletal rods.
Chapter 4 - Teeth Everywhere
1. Teeth make great fossils – why are they “as hard as rocks?”
Teeth make great fossils but are “as hard as rocks” because they contain a large amount of hydroxyapatite. The hydroxyapatite makes it harder to decay, allowing it to be the best part of the creature that can be preserved.
2. What are conodonts? What extant species contains them?
Conodonts are described