#Question id: 26982
#Unit 10. Ecological Principles
Which of the following statements about the evolution of life histories is correct?
a.Unstable environments with unlimited resources favor r-selected populations.
b.K-selected populations are most often found in environments where density-independent factors are important regulators of population size.
c.Most populations have both r- and K-selected characteristics that vary under different environmental conditions.
d.The reproductive efforts of r-selected populations are directed at producing just a few offspring with good competitive abilities.
#Question id: 699
#Unit 1. Molecules and their Interaction Relevant to Biology
The three-dimensional conformation of a protein may be strongly influenced by amino acid residues that are very far apart in sequence. This relationship is in contrast to secondary structure, where the amino acid residues are:
#Question id: 22060
#Unit 1. Molecules and their Interaction Relevant to Biology
#Question id: 17672
#Unit 9. Diversity of Life Forms
#Question id: 3754
#Unit 3. Fundamental Processes
Thymine makes up 28% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be guanine?