Describe how continental drift resulting in Australia being isolated in the South Pacific contributed to
biological species evolution. What will be an ideal response?
Concepts to Consider: The breakup of Pangaea as a result of continental drift led to drifting apart
major portions of once connected land masses. In Pangaea, areas of geological activity such as
volcanism and land features like rivers, lakes, and mountains would have potentially kept populations
isolated and species would have evolved accordingly. The initial pattern of plant and animal
distribution would be different and dependent upon their location with respect to the original land
mass. However, over the course of time these isolated populations would be exposed to new
environmental conditions leading to adaptive radiation and biological speciation.
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In certain areas of the world where there's a high incidence of malaria, there's also a high incidence of sickle-cell anemia. Sickle-cell anemia results from a mutation in the gene that codes for hemoglobin
Malaria is an infectious disease carried by mosquitoes. Both malaria and sickle-cell anemia can be fatal. If an individual is homozygous for normal hemoglobin, they're more prone to malaria. If an individual is homozygous for sickle-cell hemoglobin, they'll develop sickle-cell anemia. However, if an individual is heterozygous and possesses one allele for normal hemoglobin and one allele for sickle-cell hemoglobin, they're less prone to malaria and won't develop sickle-cell disease. What description applies to this example? A) Being heterozygous can result in greater fitness for an individual. B) Inbreeding depression can result in reduced rates of survival. C) Genetic drift can occur in small populations. D) Homozygous individuals are often unhealthy.
New species may result from
A. polyploidy. B. adaptive radiation. C. divergent evolution. D. All of these answers are true
Koch's postulates are the essential foundation for which of the following?
a. The steps that relate a specific microbe to a specific disease (etiology) b. The experiments leading to the germ theory of disease c. The process used to develop pasteurization d. The experiments leading to the development of the scientific method
Answer the following questions true (T) or false (F)
1. Lobe-finned fish gave rise to tetrapods that successfully moved onto land. 2. There are currently at least 2 dozen species who are candidates for membership in the Hominini (human-like primate) group. 3. The hominid group of primates has existed on Earth for approximately 6—7 million years.