According to Hugo de Vries, the mechanism of evolution is:

1. Multiple-step mutations
2. Saltation
3. Phenotypic variations
4. Minor mutations

Genetic drift operates in:

1. small isolated population

2. large isolated population

3. non-reproductive population

4. slow reproductive population

The chronological order of human evolution from early to the recent is?

Variation in gene frequencies within populations can occur by chance rather than by natural selection. 
This is referred to as:

1. Genetic drift

2. Random mating

3. Genetic load

4. Genetic flow

Darwin's finches are a good example of:

1. industrial melanism

2. connecting link

3. adaptive radiation

4. convergent evolution

Given that the frequency of children homozygous for the recessive allele for cystic
fibrosis is about 0.0016. What is the frequency of heterozygotes in the population? [Cystic fibrosis is inherited as an autosomal recessive disorder].

1. 0.960

2. 0.077

3. 0.040

4. 0.923

Peripatus is a connecting link between:

1. Ctenophora and Plantyhelminthes

2. Mollusca and Echinodermata

3. Annelida and Arthropoda

4. Coelenterata and Poriphera

One of the important consequences of geographical isolation is:

1. no change in the isolated fauna

2. preventing speciation

3. speciation through reproductive isolation

4. random creation of new species