#Question id: 12950
#Unit 7. System Physiology – Animal
#Question id: 6948
#Unit 5. Developmental Biology
Which of the following genes is expressed at the posterior margin of each parasegment
#Question id: 13131
#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.
The numbers of adult flies that emerged from the three populations in the first generation are closest to which of the following?
#Question id: 4355
#Unit 3. Fundamental Processes
The reason for differences in the sets of proteins expressed in a nerve and a pancreatic cell of the same individual is that nerve and pancreatic cells contain different __.
#Question id: 3487
#Unit 11. Evolution and Behavior
Which of the following is true of innate behaviors?
A) Genes have very little influence on the expression of innate behaviors.
B) Innate behaviors tend to vary considerably among members of a population.
C) Innate behaviors are limited to invertebrate animals.
D) Innate behaviors are expressed in most individuals in a population across a wide range of environmental conditions.
E) Innate behaviors occur in invertebrates and some vertebrates but not in mammals.