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Homework answers / question archive / California State University, Northridge BIO 101 Chapter 16 1)Exoskeletons provided an evolutionary advantage to organisms by: 2
California State University, Northridge
BIO 101
Chapter 16
1)Exoskeletons provided an evolutionary advantage to organisms by:
2. A horse has a diploid number (2n) of 64 chromosomes and a donkey has 2n = 62. The hybrid of these two species, mules, have 2n = 63 and are sterile. Why are mules sterile?
3. If you open a can of chicken noodle soup and immediately examine it microscopically, you will find no microorganisms. If you let the open can sit on the shelf for a few weeks and then examine it, you will find lots of microorganisms. The source of these microorganisms is most likely:
4. A group of interbreeding natural populations that is reproductively isolated from other such groups is a:
5. The myrtle warbler and the Audubon warbler were once thought to be members of different species, but now they are known to be in the same species because
6. Two species of squirrels live on either side of the Grand Canyon. It is believed that a long time ago, before being separated by the canyon, they were the same species. This is an example of:
7. Louis Pasteur did an experiment that
8. Suppose two species of snails are physically unable to mate. This is an example of:
9. The first multicellular terrestrial organisms were:
10 Which of these statements are completely correct?
11 Match each of these events with their approximate age.
12 Ligers, the offspring from the mating of a lion and a tiger, are sterile. This is an example of:
13. Before the modern era of science, organisms were assigned to species on the basis of:
14. The Cordilleran flycatcher and Pacific-slope flycatcher were once thought to be the same species, but they are now known to be different species because
15. The earliest fossil organisms resemble modern:
16. Some RNA molecules have been discovered that can:
17. The process by which new species form is termed
18. The Kaibab squirrel lives on the north side of the Grand Canyon, and the Abert squirrel lives on the south side. Even though these two populations are only miles apart, their gene pools are kept isolated by:
19 The scientists usually given credit for disproving the theory of spontaneous generation of bacteria are:
20 Tigers and lions are different species because
22. Modern invertebrates first appear in the fossil record during the:
