TLS Online TPP Program

#Question id: 16892


A test to screen for a serious but curable disease is similar to hypothesis testing, with a null hypothesis of no disease, and an alternative hypothesis of disease. If the null hypothesis is rejected treatment will be given. Otherwise, it will not. Assuming the treatment does not have serious side effects, in this scenario it is better to increase the probability of:

#Section 3: Mathematics and Quantitative Ecology
  1. making a Type 1 error, providing treatment when it is not needed.
  2. making a Type 1 error, not providing treatment when it is needed.
  3. making a Type 2 error, providing treatment when it is not needed.
  4. making a Type 2 error, not providing treatment when it is needed.
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TLS Online TPP Program

#Question id: 3372

#Section 2: Evolution

Fish, penguin and Dolphin are independently evolved similar traits as a result of having to adapt to similar environments or ecological niches.

A. On a molecular level, this can happen due to random mutation in unrelated taxon to adaptive changes

B. This is the example of divergent evolution, occurred due to similar group of organisms inhabiting different environments

C. Similar phenotype are produced by identical change in orthologous gene

D. This is the example of convergent evolution, occurred due to similar group of organisms inhabiting different environments

Which of the following is the correct combination?

TLS Online TPP Program

#Question id: 3369

#Section 2: Evolution

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: 3368

#Section 2: Evolution

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: 3355

#Section 2: Evolution

Speciation in ancestor as following way

A- Non-swimming populations separated by a river may gradually diverge because there is no gene flow between them

B- Plants commonly exhibit polyploidy, meaning they contain three or more sets of chromosomes

C- The tendency for two species to diverge in morphology and thus resource use because of competition

Which of the following above condition allowed to which type of speciation?

TLS Online TPP Program

#Question id: 16771

#Section 3: Mathematics and Quantitative Ecology

What is the median?

TLS Online TPP Program

#Question id: 16772

#Section 3: Mathematics and Quantitative Ecology

What is the Median of the following data sample? 2, 7, 4, 8, 9, 10, 6, 12, 13