TLS Online TPP Program

#Question id: 12577


During  a  field  trip,  an  instructor  touched  a  moth  resting  on  a  tree  trunk.  The  moth  raised  its  forewings  to  reveal large eyespots on its hind wings. The instructor asked why the moth lifted its wings. One student answered that sensory  receptors  had  fired  and  triggered  a  neuronal  reflex  culminating  in  the  contraction  of  certain  muscles.  A second student responded that the behaviour might frighten predators. Which statement best describes these explanations?

#Unit 10. Ecological Principles
  1. The first explanation is correct, but the second is incorrect.
  2. The first explanation refers to proximate causation, whereas the second refers to ultimate causation. 
  3. The first explanation is biological, whereas the second is philosophical.
  4. The first explanation is testable as a scientific hypothesis, whereas the second is not
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TLS Online TPP Program

#Question id: 3365

#Unit 11. Evolution and Behavior

Consider a population of 10,000 individuals, of which 2500 are homozygotes (PP) and 3000 are heterozygotes (Pp) genotype. The frequency of allele p in the population is

TLS Online TPP Program

#Question id: 3366

#Unit 11. Evolution and Behavior

Red-Green color blindness is an X-linked recessive disorder. In a population which is in the Hardy-  Weinberg equilibrium, the incidence of occurrence of this in males is 2:2000. What will be the expected incidence of affected homozygous females?

TLS Online TPP Program

#Question id: 3367

#Unit 11. Evolution and Behavior

The largest unit within which gene flow can readily occur is a

TLS Online TPP Program

#Question id: 3368

#Unit 11. Evolution and Behavior

The origin of a new plant species by hybridization, coupled with accidents during nuclear division, is an example of

TLS Online TPP Program

#Question id: 3369

#Unit 11. Evolution and Behavior

Genetic drift refers to random changes in allele frequencies over time leads to following consequence

a. Loss of genetic diversity per generation   

b. change in allelic frequency just by chance 

c. It caused adaptive evolution

d. It one allele may reach to 0 frequency

TLS Online TPP Program

#Question id: 3370

#Unit 11. Evolution and Behavior

One thousand independent populations of Drosophila are established with 25 individuals in each population, of which, one individual is of Aa genotype and the other nine are of AA genotype. If random genetic drift is the only mechanism acting on these populations, then, after a large number of generations, the expected number of populations fixed for the "a" allele is