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TLS Online TPP Program

#Question id: 3258

Which of the following incorrect about genetic drift

#Unit 11. Evolution and Behavior

  1. There is no link with fitness    

  2. Change the frequency of one allele either positively or negatively at each generation

  3. Genetic drift responsible for directional changes in allele frequencies over several generations.

  4. This is micro evolutionary force

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TLS Online TPP Program

#Question id: 12807

#Unit 10. Ecological Principles

If Earth's axis of rotation suddenly became perpendicular to the plane of its orbit, the most predictable effect would be
TLS Online TPP Program

#Question id: 11914

#Unit 10. Ecological Principles

Alder trees, which harbour nitrogen-fixing bacteria in their roots, provide nitrogen to soils developing on sandbars rivers, this is an example of,
TLS Online TPP Program

#Question id: 3537

#Unit 8. Inheritance Biology

What is the probability of two offspring in which one dominant phenotype and one recessive phenotype from the mating Aa × Aa?
TLS Online TPP Program

#Question id: 26951

#Unit 10. Ecological Principles

The net reproductive rate (R0) is 1.5 for a given population. If Nt , the population of females at generation t, is 300, then what will be the population of females after four generations (Nt+4)?
TLS Online TPP Program

#Question id: 5298

#Unit 8. Inheritance Biology

Four E. coli strains of genotype a+ b− are labeled 1, 2, 3, and 4. Four strains of genotype a− b+ are labeled 5, 6, 7, and 8. The two genotypes are mixed in all possible combinations and (after incubation) are plated to determine the frequency of a+ b+ recombinants. The following results are obtained, where M = many recombinants, L = low numbers of recombinants, and 0 = no recombinants. On the basis of these results, assign a sex type (either Hfr, F+, or F−) to each strain