Question

Identifying Major Themes - Chapter 8 Part A Can you identify the major theme illustrated by each of the following examples? If necessary, you may review the themes in Chapter 1 of your book. Match the themes on the left with the examples on the right. Not all themes will be used. Reset Help Evolution Cancer cells do not respond normally to the specialized proteins that control the cell cycle, they divide excessively and may invade other tissues of the body. Information flow Interactions within biological systems Sexual reproduction may enhance fitness by producing offspring of varied genetic makeup, speeding adaptation to a changing environment. Pathways that transform energy and matter Long molecules of DNA can fit into the tiny nucleus because within each chromosome the DNA is packed into an elaborate, multilevel system of coiling and folding Relationship of structure to function During cell division, each daughter cell receives one identical set of chromosomes from the original parent cell.

Answer 1

1. INTERACTIONS WITHING BIOLOGICAL SYSTEMS
Cancers cells do not respond to normal cellular signals due to the accumulation of mutations in proto-oncogenes or tumor suppressor genes.

2. EVOLUTION
Evolution = Descent with modification
Sexual reproduction is essential for evolution to occur.

3. RELATIONSHIP OF STRUCTURE TO FUNCTION
DNA is folded into nucleosome and higher-order structures in order to fit into the nucleus.

4. INFORMATION FLOW
Each daughter cell inherits the genome i.e. the information required for its growth and survival from its parent cell.