Read and sign the academic integrity statement below.

NOTE: We encourage people to work and study together, but the final product should be an INDIVIDUAL effort. Discuss and talk over questions together, but mark your answers by yourself after the study session.

Your job is to convince your instructor that YOU understand these ideas.

Work copied from others will not be accepted. Because answers will be posted on the web immediately after the due time, late work will not be accepted.

Academic Integrity in Biology 100/101

I have read and understand Part #4 of the University of Illinois Code of Policies and Regulations Applying to All Students which deals with Academic Integrity.

Signature

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Please use the "Talk to Sarah and Ed" Forum in Moodle if you wish to discuss the assignment further.

Don't overlook the links to web resources and references to text pages below that WILL be useful in answering these questions. Activities in lecture, discussion, and laboratory classes will also address these questions.

Completion of these questions will help you achieve the objectives for lectures #21 , #22, #23, #24, #25, #26, and and #27

A. Mark the answers you think to be correct on this form or on a separate sheet.

B. Type your explanations of why you think the answer you chose for each question is correct.

1. The Asian carp is an invasive species that has been released into US waters. These fish have proven to be aggressive filter feeders, eating the small animals that form the basis of the food chain for native aquatic communities. Asian carp are in the Illinois river and threaten to invade lake Michigan. The introduction of these fish will ultimately result in:

2. Some populations (strains) of the common bacterium, Staphylococcus aureus have become resistant to the antibiotic, methicillin, and most other commonly used antibiotics. We are almost daily hearing of people being infected, becoming very ill, and even dying of methicillin resistant (MRSA) bacteria. It is thought that improper use or excessive use of antibiotics has lead to the emergence of these methicillin resistant (MRSA) bacteria. The appearance of MRSA Staph. bacteria is the result of ____________ selection.

3. Hammer orchids produce flowers that resemble the female of a certain wasp species in both appearance and odor. Male wasps are attracted to the flowers, and in their attempt to mate with what they think is a female wasp, manage to pollinate the orchid flowers. Plants of this species that produce flowers that best resemble female wasps are more likely to be pollinated and pass their genes on to their offspring. As a result, the hammer orchids in the population are all good wasp mimics. This tendency toward genetic uniformity in the hammer orchid population that has emerged over many generations is an example of which fundamental quality shared by all living organisms?

4. Occasionally, birds of one species living in a forest are blown by storms long distances from one forest area to another where another population of the same bird species is living. The new birds in the forest may mate with birds in their new forest home and produce offspring that later mate with others of the same species. This is an example of:

5. Animals from two different species having different chromosome numbers, such as horses and donkeys, can be bred to produce sterile hybrids, known as mules. These hybrids are generaly sterile because:

6. A group of land dwelling tortoises are sunning themselves on a rock by the seashore and are swept off the rock by a freak, giant wave and drowned. As a result of this accident, most of the individuals carrying a dominant allele for resistance to a deadly turtle disease are, by chance, lost from the population. This would be an example of:

7. Seventy-one thousand years ago a huge volcanic eruption ejected a massive amount of material into the atmosphere. Sunlight was blocked for so long that that a thousand years of very cold global climate followed. During this time of hardship, the total population of the human species was drastically reduced, leaving only a few thousand people in small populations in Africa. The 6 billion people that now populate the earth are thought to be descendents of those small African populations that later migrated out of Africa. The genetic effects of this drastic population reduction is an example of:

8. Male Bower birds build elaborate twig bowers and provision them with a treasure of food and brightly colored objects. All this activity is a bid to attract and seduce a mate. This behavior is an example of:

9. In order for two populations of a sexually reproducing species to possibly evolve into two different species, which of the following MUST happen?

10. The modern scientific theories of the mechanisms of evolution including Darwin's theory of evolution by natural selection, genetic drift, punctuated equilibrium, etc.: