#Question id: 13132
#Unit 10. Ecological Principles
Biologists performed an experiment with flies to examine the effects of population size on the maintenance of genetic variation and on egg-to-adult survival. From a large source population, they randomly assigned eggs to three experimental populations of size N, equal to 20, 60, and0100. For later generations, they collected N eggs from each population and moved them into identical vials that co0ntained f2re0sh me4d0ium. Th6e0y coun8te0d the number of adult flies that emerged and used tissue samples from the adults for genetic analyses. Genetic variation was measured by scoring alleles at several polymorphic loci and expressed as the average number of alleles at those loci. The results are summarized in Figure 1 and Figure 2 below.
Which other process appears to have substantially influenced the outcome of this experiment?
#Question id: 11081
#Unit 7. System Physiology – Animal
In which of the following conditions is alveolar Po2 increased and alveolar Pco2 decreased?
#Question id: 391
#Unit 1. Molecules and their Interaction Relevant to Biology
In a hospital laboratory, a 10.0 mL sample of gastric juice, obtained several hours after a meal, was titrated with 0.1 M NaOH to neutrality; 7.2 mL of NaOH was required. The patient’s stomach contained no ingested food or drink, thus assume that no buffers were present. What was the pH of the gastric juice?
#Question id: 4156
#Unit 3. Fundamental Processes
The reading frame of DNA is fixed by
#Question id: 12959
#Unit 10. Ecological Principles