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TLS Online TPP Program

#Question id: 12978

Why is territoriality an adaptive behavior for songbirds maintaining populations at or near their carrying capacity? 

#Unit 10. Ecological Principles
  1. Songbirds expend a tremendous amount of energy defending territories so that they spend less time feeding their young and fledgling mortality increases.
  2. Only  the  fittest males defend territories and  they attract the  fittest females so  the  best genes are  conveyed to the next generation.
  3. Songbird males defend territories commensurate with  the size  from which  they can derive adequate re- sources for themselves, their mate, and their chicks.
  4. Many individuals are killed in the ritualistic conflicts that go along with territorial defense.
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TLS Online TPP Program

#Question id: 33480

#Unit 2. Cellular Organization

Finding: The overall degree of divergence between two homologous exons in related genes corresponds to the differences between the polypeptides.

Reason: Overall degree of divergence between two homologous exons is mostly a result of base substitutions.
TLS Online TPP Program

#Question id: 33481

#Unit 2. Cellular Organization

A. In homologous introns, the pattern of divergence involves both changes in length.
B. Divergence in introns is due to deletions and insertions and base substitutions. 
C. Introns are slowly evolve while exons much more rapidly 
D. When a gene is compared among different species, there are instances where its exons are homologous but its introns have diverged so much that very little homology is retained.
TLS Online TPP Program

#Question id: 33482

#Unit 2. Cellular Organization

Find true and false statements
A. In general, mutations occur at the same rate in both exons and introns, 
B. Exon mutations are eliminated more effectively by selection.
C. Introns may more freely accumulate point substitutions and other changes.
TLS Online TPP Program

#Question id: 33483

#Unit 2. Cellular Organization

Which of the following is correct
A. A set of homologous genes should share common features that preceded their evolutionary separation.
B. All globin genes have a common form of organization with four exons and one introns.
C. A gene family is defined as a group of genes that encode related or identical products as a result of gene-duplication events.
TLS Online TPP Program

#Question id: 33484

#Unit 2. Cellular Organization

When a complete gene is found within the intron of a larger “host” gene called as
TLS Online TPP Program

#Question id: 33485

#Unit 2. Cellular Organization

Most genes are uninterrupted in yeast, but most genes are interrupted in flies and mammals. Uninterrupted genes have