TLS Online TPP Program

#Question id: 4658


Members of two different species possess a similar-looking structure that they use in a similar fashion to perform the same function. Which information would best help distinguish between an explanation based on homology versus one based on convergent evolution?

#Unit 9. Evolution & Diversity of Life Forms
  1. The two species live at great distance from each other.

  2. The two species share many proteins in common, and the nucleotide sequences that code for these proteins are almost identical.

  3. The sizes of the structures in adult members of both species are similar in size.

  4. Both species are well adapted to their particular environments.

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TLS Online TPP Program

#Question id: 3265

#Unit 9. Evolution & Diversity of Life Forms

If the curve shifts to the left or to the right, there is no gene flow, and the population size consequently increases over successive generations, then which of these is (are) probably occurring?

TLS Online TPP Program

#Question id: 3266

#Unit 9. Evolution & Diversity of Life Forms

One species mates at the season when daylight is increasing from 13 hours to 13 hours, 15 minutes; another species mates at the season when daylight is increasing from 14 hours to 14 hours, 15 minutes. The isolating mechanism is

TLS Online TPP Program

#Question id: 3267

#Unit 9. Evolution & Diversity of Life Forms

In a typical Mendelian population, individuals carrying gene ‘a’ in homozygous condition suffer from phenylketonurea. Those with A in homozygous condition are normal. Others, who are heterozygotic with Aa, are carriers. If the frequency of ‘a’ in a population is 0.20, what is the percentage of normal individual in the population?

TLS Online TPP Program

#Question id: 3268

#Unit 9. Evolution & Diversity of Life Forms

A population of insects is in Hardy-Weinberg equilibrium for a gene with alleles A = orange and a = yellow eyes. There are 91% orange and 9% yellow individuals in the population. If the fitness of the yellow phenotype suddenly drops to zero, what will be the allele frequency in the next generation?

TLS Online TPP Program

#Question id: 3269

#Unit 9. Evolution & Diversity of Life Forms

Two plant species live in the same biome but on different continents. Although the two species are not at all closely related, they may appear quite similar as a result of

TLS Online TPP Program

#Question id: 3270

#Unit 9. Evolution & Diversity of Life Forms

Heterozygote advantage should be most closely linked to which of the following?